/* SuMore 新版官网 — 现代深色系 / D5 气质 */
:root {
  --bg-deep: #070a0f;
  --bg-elevated: #0e141c;
  --bg-card: #121a24;
  --bg-mute: #f4f6f9;
  --border: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --text-dim: rgba(255, 255, 255, 0.55);
  --text-dark: #1a1f28;
  --text-muted: #5c6570;
  --accent: #4da3ff;
  --accent-dim: rgba(77, 163, 255, 0.15);
  --radius: 12px;
  --radius-pill: 999px;
  --max: 1200px;
  --header-h: 72px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* —— 顶栏 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: rgba(7, 10, 15, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start;
  gap: 12px 20px;
}

/* 左侧 logo + 中间主导航 | 右侧语言与移动端菜单 */
.site-header__tools {
  display: flex;
  align-items: center;
  gap: 10px 12px;
  flex-shrink: 0;
  margin-left: auto;
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  width: auto;
  min-width: min-content;
}

/* 避免全局 img{max-width:100%} 在 flex 下把 logo 压没；尺寸为原先约 80% */
.site-header .brand img {
  display: block;
  height: 32px;
  width: auto;
  max-width: none;
}

/* 顶栏主导航：用 id 限定，避免与其它页面 nav/样式冲突 */
#main-nav {
  display: flex;
  align-items: center;
  gap: 2px 4px;
  flex-wrap: wrap;
  justify-content: flex-start;
  flex: 1 1 auto;
  min-width: 0;
}

#main-nav a {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-dim);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

#main-nav a:hover,
#main-nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

#main-nav .nav__item {
  position: relative;
}

#main-nav .nav__item--active > .nav__parent {
  color: var(--text);
}

#main-nav .nav__submenu {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 148px;
  padding: 6px 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s, visibility 0.18s;
  z-index: 120;
  text-align: center;
}

#main-nav .nav__item:hover .nav__submenu,
#main-nav .nav__item:focus-within .nav__submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

#main-nav .nav__submenu a {
  display: block;
  padding: 10px 16px;
  white-space: nowrap;
  border-radius: 0;
  text-align: center;
}

#main-nav .nav__submenu a:first-child {
  border-radius: 8px 8px 0 0;
}

#main-nav .nav__submenu a:last-child {
  border-radius: 0 0 8px 8px;
}

#main-nav .nav__submenu a:only-child {
  border-radius: 8px;
}

.lang-switch {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.lang-switch__btn {
  margin: 0;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 400;
  font-family: inherit;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
  line-height: 1.2;
}

.lang-switch__btn[aria-pressed="true"] {
  background: transparent;
  color: var(--text);
}

.lang-switch__btn:hover {
  color: var(--text);
  background: transparent;
}

.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  flex-shrink: 0;
}

/* —— 按钮 —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  font-family: inherit;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: linear-gradient(135deg, #3d8ef5, #2b6fd4);
  color: #fff;
  box-shadow: 0 4px 24px rgba(45, 120, 220, 0.35);
}

.btn--primary:hover {
  box-shadow: 0 6px 32px rgba(45, 120, 220, 0.5);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn--dark {
  background: var(--text);
  color: var(--bg-deep);
}

.btn--block {
  width: 100%;
}

/* —— 首屏（封面图 + 蒙版） —— */
.hero {
  position: relative;
  isolation: isolate;
  min-height: calc(100vh - var(--header-h));
  width: 100%;
  margin: 0;
  padding: 64px 24px 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: clamp(28px, 5vw, 44px);
  text-align: center;
  overflow: hidden;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero__bg {
  position: absolute;
  inset: -4%;
  background: #050a15 url("../img/hero-cover-4000.jpg") center / cover no-repeat;
  will-change: transform;
  backface-visibility: hidden;
  animation: hero-drift 36s ease-in-out infinite alternate;
}

@keyframes hero-drift {
  0% {
    transform: scale(1) translate(0, 0);
  }
  100% {
    transform: scale(1.07) translate(0.5%, -0.5%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__bg {
    animation: none;
  }
}

/* 自左向右压暗递减（不透明度 90%→5%），保证左侧标题可读 */
.hero__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(5, 10, 21, 0.9) 0%,
    rgba(5, 10, 21, 0.7) 20%,
    rgba(5, 10, 21, 0.5) 40%,
    rgba(5, 10, 21, 0.3) 60%,
    rgba(5, 10, 21, 0.1) 80%,
    rgba(5, 10, 21, 0.05) 100%
  );
}

/* 细微星点层，增强银河感（叠加在蒙版之上、内容之下） */
.hero__stars {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(1px 1px at 30% 65%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 70% 40%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1.5px 1.5px at 85% 75%, rgba(200, 230, 255, 0.8), transparent),
    radial-gradient(1px 1px at 50% 88%, rgba(255, 255, 255, 0.5), transparent);
  background-size: 100% 100%;
  mix-blend-mode: screen;
}

/* 闪烁星点（叠在静态星点之上） */
.hero__twinkle {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero__twinkle-star {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 0 3px 1px rgba(200, 230, 255, 0.55),
    0 0 10px 2px rgba(255, 255, 255, 0.12);
  opacity: 0.2;
  --tw-base: 1;
  animation: hero-twinkle var(--tw-dur, 3s) ease-in-out infinite;
  animation-delay: var(--tw-delay, 0s);
  will-change: opacity, transform;
}

@keyframes hero-twinkle {
  0%,
  100% {
    opacity: 0.08;
    transform: scale(calc(var(--tw-base) * 0.75));
  }
  45% {
    opacity: 0.95;
    transform: scale(calc(var(--tw-base) * 1.15));
  }
  55% {
    opacity: 1;
    transform: scale(calc(var(--tw-base) * 1.2));
  }
}

.hero__twinkle-star:nth-child(1) {
  left: 5%;
  top: 11%;
  --tw-dur: 2.6s;
  --tw-delay: 0s;
  --tw-base: 0.92;
}
.hero__twinkle-star:nth-child(2) {
  left: 12%;
  top: 44%;
  --tw-dur: 3.4s;
  --tw-delay: 0.35s;
  --tw-base: 0.28;
}
.hero__twinkle-star:nth-child(3) {
  left: 21%;
  top: 69%;
  --tw-dur: 2.9s;
  --tw-delay: 1.05s;
  --tw-base: 0.71;
}
.hero__twinkle-star:nth-child(4) {
  left: 36%;
  top: 16%;
  --tw-dur: 3.75s;
  --tw-delay: 0.18s;
  --tw-base: 0.45;
}
.hero__twinkle-star:nth-child(5) {
  left: 46%;
  top: 7%;
  --tw-dur: 2.45s;
  --tw-delay: 0.88s;
  --tw-base: 1;
}
.hero__twinkle-star:nth-child(6) {
  left: 51%;
  top: 53%;
  --tw-dur: 3.15s;
  --tw-delay: 1.55s;
  --tw-base: 0.33;
}
.hero__twinkle-star:nth-child(7) {
  left: 61%;
  top: 26%;
  --tw-dur: 2.72s;
  --tw-delay: 0.5s;
  --tw-base: 0.84;
}
.hero__twinkle-star:nth-child(8) {
  left: 71%;
  top: 13%;
  --tw-dur: 3.48s;
  --tw-delay: 1.22s;
  --tw-base: 0.22;
}
.hero__twinkle-star:nth-child(9) {
  left: 77%;
  top: 46%;
  --tw-dur: 2.52s;
  --tw-delay: 0.12s;
  --tw-base: 0.63;
}
.hero__twinkle-star:nth-child(10) {
  left: 87%;
  top: 21%;
  --tw-dur: 3.08s;
  --tw-delay: 0.72s;
  --tw-base: 0.55;
}
.hero__twinkle-star:nth-child(11) {
  left: 93%;
  top: 61%;
  --tw-dur: 2.82s;
  --tw-delay: 1.38s;
  --tw-base: 0.38;
}
.hero__twinkle-star:nth-child(12) {
  left: 17%;
  top: 86%;
  --tw-dur: 3.58s;
  --tw-delay: 0.28s;
  --tw-base: 0.78;
}
.hero__twinkle-star:nth-child(13) {
  left: 32%;
  top: 76%;
  --tw-dur: 2.28s;
  --tw-delay: 1s;
  --tw-base: 0.26;
}
.hero__twinkle-star:nth-child(14) {
  left: 64%;
  top: 81%;
  --tw-dur: 3.28s;
  --tw-delay: 0.62s;
  --tw-base: 0.96;
}
.hero__twinkle-star:nth-child(15) {
  left: 7%;
  top: 51%;
  --tw-dur: 2.92s;
  --tw-delay: 1.2s;
  --tw-base: 0.41;
}
.hero__twinkle-star:nth-child(16) {
  left: 42%;
  top: 36%;
  --tw-dur: 3.42s;
  --tw-delay: 0.48s;
  --tw-base: 0.67;
}
.hero__twinkle-star:nth-child(17) {
  left: 3%;
  top: 28%;
  --tw-dur: 3.05s;
  --tw-delay: 0.82s;
  --tw-base: 0.2;
}
.hero__twinkle-star:nth-child(18) {
  left: 9%;
  top: 73%;
  --tw-dur: 2.62s;
  --tw-delay: 0.05s;
  --tw-base: 0.88;
}
.hero__twinkle-star:nth-child(19) {
  left: 26%;
  top: 31%;
  --tw-dur: 3.22s;
  --tw-delay: 1.42s;
  --tw-base: 0.35;
}
.hero__twinkle-star:nth-child(20) {
  left: 29%;
  top: 92%;
  --tw-dur: 2.38s;
  --tw-delay: 0.58s;
  --tw-base: 0.58;
}
.hero__twinkle-star:nth-child(21) {
  left: 40%;
  top: 62%;
  --tw-dur: 3.52s;
  --tw-delay: 0.92s;
  --tw-base: 0.24;
}
.hero__twinkle-star:nth-child(22) {
  left: 54%;
  top: 34%;
  --tw-dur: 2.88s;
  --tw-delay: 0.22s;
  --tw-base: 0.73;
}
.hero__twinkle-star:nth-child(23) {
  left: 58%;
  top: 71%;
  --tw-dur: 3.12s;
  --tw-delay: 1.68s;
  --tw-base: 0.48;
}
.hero__twinkle-star:nth-child(24) {
  left: 69%;
  top: 56%;
  --tw-dur: 2.55s;
  --tw-delay: 0.38s;
  --tw-base: 0.31;
}
.hero__twinkle-star:nth-child(25) {
  left: 74%;
  top: 91%;
  --tw-dur: 3.35s;
  --tw-delay: 1.08s;
  --tw-base: 0.82;
}
.hero__twinkle-star:nth-child(26) {
  left: 82%;
  top: 38%;
  --tw-dur: 2.72s;
  --tw-delay: 0.65s;
  --tw-base: 0.44;
}
.hero__twinkle-star:nth-child(27) {
  left: 90%;
  top: 8%;
  --tw-dur: 2.95s;
  --tw-delay: 1.52s;
  --tw-base: 0.59;
}
.hero__twinkle-star:nth-child(28) {
  left: 96%;
  top: 48%;
  --tw-dur: 3.18s;
  --tw-delay: 0.15s;
  --tw-base: 0.27;
}
.hero__twinkle-star:nth-child(29) {
  left: 11%;
  top: 19%;
  --tw-dur: 2.42s;
  --tw-delay: 1.28s;
  --tw-base: 0.76;
}
.hero__twinkle-star:nth-child(30) {
  left: 24%;
  top: 52%;
  --tw-dur: 3.62s;
  --tw-delay: 0.42s;
  --tw-base: 0.42;
}
.hero__twinkle-star:nth-child(31) {
  left: 33%;
  top: 9%;
  --tw-dur: 2.68s;
  --tw-delay: 0.78s;
  --tw-base: 0.91;
}
.hero__twinkle-star:nth-child(32) {
  left: 47%;
  top: 78%;
  --tw-dur: 3.08s;
  --tw-delay: 1.12s;
  --tw-base: 0.23;
}
.hero__twinkle-star:nth-child(33) {
  left: 56%;
  top: 19%;
  --tw-dur: 2.52s;
  --tw-delay: 0.32s;
  --tw-base: 0.65;
}
.hero__twinkle-star:nth-child(34) {
  left: 59%;
  top: 44%;
  --tw-dur: 3.45s;
  --tw-delay: 0.95s;
  --tw-base: 0.36;
}
.hero__twinkle-star:nth-child(35) {
  left: 67%;
  top: 67%;
  --tw-dur: 2.85s;
  --tw-delay: 1.35s;
  --tw-base: 0.54;
}
.hero__twinkle-star:nth-child(36) {
  left: 79%;
  top: 29%;
  --tw-dur: 3.28s;
  --tw-delay: 0.08s;
  --tw-base: 0.98;
}
.hero__twinkle-star:nth-child(37) {
  left: 84%;
  top: 74%;
  --tw-dur: 2.32s;
  --tw-delay: 0.55s;
  --tw-base: 0.3;
}
.hero__twinkle-star:nth-child(38) {
  left: 15%;
  top: 61%;
  --tw-dur: 3.55s;
  --tw-delay: 1.18s;
  --tw-base: 0.61;
}
.hero__twinkle-star:nth-child(39) {
  left: 38%;
  top: 48%;
  --tw-dur: 2.78s;
  --tw-delay: 0.25s;
  --tw-base: 0.47;
}
.hero__twinkle-star:nth-child(40) {
  left: 49%;
  top: 91%;
  --tw-dur: 3.02s;
  --tw-delay: 1.62s;
  --tw-base: 0.86;
}

.hero__twinkle-star:nth-child(41) {
  left: 80.6%;
  top: 40.6%;
  --tw-dur: 3.24s;
  --tw-delay: 0.78s;
  --tw-base: 0.91;
}
.hero__twinkle-star:nth-child(42) {
  left: 60.9%;
  top: 11.0%;
  --tw-dur: 2.33s;
  --tw-delay: 1.02s;
  --tw-base: 0.59;
}
.hero__twinkle-star:nth-child(43) {
  left: 9.4%;
  top: 48.0%;
  --tw-dur: 2.28s;
  --tw-delay: 0.53s;
  --tw-base: 0.28;
}
.hero__twinkle-star:nth-child(44) {
  left: 47.8%;
  top: 46.9%;
  --tw-dur: 2.57s;
  --tw-delay: 0.27s;
  --tw-base: 0.38;
}
.hero__twinkle-star:nth-child(45) {
  left: 76.4%;
  top: 89.1%;
  --tw-dur: 2.84s;
  --tw-delay: 1.54s;
  --tw-base: 0.93;
}
.hero__twinkle-star:nth-child(46) {
  left: 69.9%;
  top: 24.0%;
  --tw-dur: 2.67s;
  --tw-delay: 1.19s;
  --tw-base: 0.84;
}
.hero__twinkle-star:nth-child(47) {
  left: 10.1%;
  top: 91.9%;
  --tw-dur: 2.77s;
  --tw-delay: 1.22s;
  --tw-base: 0.28;
}
.hero__twinkle-star:nth-child(48) {
  left: 41.9%;
  top: 61.8%;
  --tw-dur: 2.82s;
  --tw-delay: 0.49s;
  --tw-base: 0.57;
}
.hero__twinkle-star:nth-child(49) {
  left: 92.6%;
  top: 71.2%;
  --tw-dur: 3.15s;
  --tw-delay: 0.39s;
  --tw-base: 0.91;
}
.hero__twinkle-star:nth-child(50) {
  left: 85.5%;
  top: 60.5%;
  --tw-dur: 2.68s;
  --tw-delay: 0.26s;
  --tw-base: 0.88;
}
.hero__twinkle-star:nth-child(51) {
  left: 46.3%;
  top: 38.5%;
  --tw-dur: 3.00s;
  --tw-delay: 1.31s;
  --tw-base: 0.51;
}
.hero__twinkle-star:nth-child(52) {
  left: 34.3%;
  top: 41.7%;
  --tw-dur: 3.13s;
  --tw-delay: 0.06s;
  --tw-base: 0.84;
}
.hero__twinkle-star:nth-child(53) {
  left: 47.2%;
  top: 13.8%;
  --tw-dur: 3.12s;
  --tw-delay: 0.53s;
  --tw-base: 0.54;
}
.hero__twinkle-star:nth-child(54) {
  left: 9.0%;
  top: 36.9%;
  --tw-dur: 3.53s;
  --tw-delay: 0.50s;
  --tw-base: 0.54;
}
.hero__twinkle-star:nth-child(55) {
  left: 85.8%;
  top: 61.7%;
  --tw-dur: 3.31s;
  --tw-delay: 1.00s;
  --tw-base: 0.59;
}
.hero__twinkle-star:nth-child(56) {
  left: 29.0%;
  top: 85.2%;
  --tw-dur: 2.38s;
  --tw-delay: 0.03s;
  --tw-base: 0.47;
}
.hero__twinkle-star:nth-child(57) {
  left: 33.4%;
  top: 60.6%;
  --tw-dur: 3.16s;
  --tw-delay: 1.21s;
  --tw-base: 0.73;
}
.hero__twinkle-star:nth-child(58) {
  left: 58.7%;
  top: 21.1%;
  --tw-dur: 3.02s;
  --tw-delay: 1.45s;
  --tw-base: 0.76;
}
.hero__twinkle-star:nth-child(59) {
  left: 56.7%;
  top: 84.9%;
  --tw-dur: 3.75s;
  --tw-delay: 1.66s;
  --tw-base: 0.24;
}
.hero__twinkle-star:nth-child(60) {
  left: 49.3%;
  top: 84.5%;
  --tw-dur: 2.76s;
  --tw-delay: 0.75s;
  --tw-base: 0.41;
}
.hero__twinkle-star:nth-child(61) {
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  --tw-base: 0.38;
}
.hero__twinkle-star:nth-child(166) {
  left: 49.4%;
  top: 51.1%;
  --tw-dur: 3.45s;
  --tw-delay: 0.55s;
  --tw-base: 0.69;
}
.hero__twinkle-star:nth-child(167) {
  left: 40.6%;
  top: 26.6%;
  --tw-dur: 3.58s;
  --tw-delay: 0.72s;
  --tw-base: 0.32;
}
.hero__twinkle-star:nth-child(168) {
  left: 31.8%;
  top: 88.2%;
  --tw-dur: 3.71s;
  --tw-delay: 0.89s;
  --tw-base: 0.63;
}
.hero__twinkle-star:nth-child(169) {
  left: 23.0%;
  top: 63.7%;
  --tw-dur: 3.84s;
  --tw-delay: 1.06s;
  --tw-base: 0.26;
}
.hero__twinkle-star:nth-child(170) {
  left: 14.2%;
  top: 39.2%;
  --tw-dur: 3.97s;
  --tw-delay: 1.23s;
  --tw-base: 0.57;
}
.hero__twinkle-star:nth-child(171) {
  left: 5.4%;
  top: 14.7%;
  --tw-dur: 2.30s;
  --tw-delay: 1.40s;
  --tw-base: 0.88;
}
.hero__twinkle-star:nth-child(172) {
  left: 84.6%;
  top: 76.2%;
  --tw-dur: 2.43s;
  --tw-delay: 0.07s;
  --tw-base: 0.51;
}
.hero__twinkle-star:nth-child(173) {
  left: 75.8%;
  top: 51.7%;
  --tw-dur: 2.56s;
  --tw-delay: 0.24s;
  --tw-base: 0.82;
}
.hero__twinkle-star:nth-child(174) {
  left: 66.9%;
  top: 27.2%;
  --tw-dur: 2.69s;
  --tw-delay: 0.41s;
  --tw-base: 0.45;
}
.hero__twinkle-star:nth-child(175) {
  left: 58.1%;
  top: 88.7%;
  --tw-dur: 2.82s;
  --tw-delay: 0.58s;
  --tw-base: 0.76;
}
.hero__twinkle-star:nth-child(176) {
  left: 49.3%;
  top: 64.2%;
  --tw-dur: 2.95s;
  --tw-delay: 0.75s;
  --tw-base: 0.39;
}
.hero__twinkle-star:nth-child(177) {
  left: 40.5%;
  top: 39.8%;
  --tw-dur: 3.08s;
  --tw-delay: 0.92s;
  --tw-base: 0.70;
}
.hero__twinkle-star:nth-child(178) {
  left: 31.7%;
  top: 15.3%;
  --tw-dur: 3.21s;
  --tw-delay: 1.09s;
  --tw-base: 0.33;
}
.hero__twinkle-star:nth-child(179) {
  left: 22.9%;
  top: 76.8%;
  --tw-dur: 3.34s;
  --tw-delay: 1.26s;
  --tw-base: 0.64;
}
.hero__twinkle-star:nth-child(180) {
  left: 14.1%;
  top: 52.3%;
  --tw-dur: 3.47s;
  --tw-delay: 1.43s;
  --tw-base: 0.27;
}
.hero__twinkle-star:nth-child(181) {
  left: 5.3%;
  top: 27.8%;
  --tw-dur: 3.60s;
  --tw-delay: 0.10s;
  --tw-base: 0.58;
}
.hero__twinkle-star:nth-child(182) {
  left: 84.5%;
  top: 89.3%;
  --tw-dur: 3.73s;
  --tw-delay: 0.27s;
  --tw-base: 0.89;
}
.hero__twinkle-star:nth-child(183) {
  left: 75.7%;
  top: 64.8%;
  --tw-dur: 3.86s;
  --tw-delay: 0.44s;
  --tw-base: 0.52;
}
.hero__twinkle-star:nth-child(184) {
  left: 66.8%;
  top: 40.3%;
  --tw-dur: 3.99s;
  --tw-delay: 0.61s;
  --tw-base: 0.83;
}
.hero__twinkle-star:nth-child(185) {
  left: 58.0%;
  top: 15.8%;
  --tw-dur: 2.32s;
  --tw-delay: 0.78s;
  --tw-base: 0.46;
}
.hero__twinkle-star:nth-child(186) {
  left: 49.2%;
  top: 77.3%;
  --tw-dur: 2.45s;
  --tw-delay: 0.95s;
  --tw-base: 0.77;
}
.hero__twinkle-star:nth-child(187) {
  left: 40.4%;
  top: 52.9%;
  --tw-dur: 2.58s;
  --tw-delay: 1.12s;
  --tw-base: 0.40;
}
.hero__twinkle-star:nth-child(188) {
  left: 31.6%;
  top: 28.4%;
  --tw-dur: 2.71s;
  --tw-delay: 1.29s;
  --tw-base: 0.71;
}
.hero__twinkle-star:nth-child(189) {
  left: 22.8%;
  top: 89.9%;
  --tw-dur: 2.84s;
  --tw-delay: 1.46s;
  --tw-base: 0.34;
}
.hero__twinkle-star:nth-child(190) {
  left: 14.0%;
  top: 65.4%;
  --tw-dur: 2.97s;
  --tw-delay: 0.13s;
  --tw-base: 0.65;
}
.hero__twinkle-star:nth-child(191) {
  left: 5.2%;
  top: 40.9%;
  --tw-dur: 3.10s;
  --tw-delay: 0.30s;
  --tw-base: 0.28;
}
.hero__twinkle-star:nth-child(192) {
  left: 84.4%;
  top: 16.4%;
  --tw-dur: 3.23s;
  --tw-delay: 0.47s;
  --tw-base: 0.59;
}
.hero__twinkle-star:nth-child(193) {
  left: 75.5%;
  top: 77.9%;
  --tw-dur: 3.36s;
  --tw-delay: 0.64s;
  --tw-base: 0.90;
}
.hero__twinkle-star:nth-child(194) {
  left: 66.7%;
  top: 53.4%;
  --tw-dur: 3.49s;
  --tw-delay: 0.81s;
  --tw-base: 0.53;
}
.hero__twinkle-star:nth-child(195) {
  left: 57.9%;
  top: 28.9%;
  --tw-dur: 3.62s;
  --tw-delay: 0.98s;
  --tw-base: 0.84;
}
.hero__twinkle-star:nth-child(196) {
  left: 49.1%;
  top: 4.4%;
  --tw-dur: 3.75s;
  --tw-delay: 1.15s;
  --tw-base: 0.47;
}
.hero__twinkle-star:nth-child(197) {
  left: 40.3%;
  top: 66.0%;
  --tw-dur: 3.88s;
  --tw-delay: 1.32s;
  --tw-base: 0.78;
}
.hero__twinkle-star:nth-child(198) {
  left: 31.5%;
  top: 41.5%;
  --tw-dur: 2.21s;
  --tw-delay: 1.49s;
  --tw-base: 0.41;
}
.hero__twinkle-star:nth-child(199) {
  left: 22.7%;
  top: 17.0%;
  --tw-dur: 2.34s;
  --tw-delay: 0.16s;
  --tw-base: 0.72;
}
.hero__twinkle-star:nth-child(200) {
  left: 13.9%;
  top: 78.5%;
  --tw-dur: 2.47s;
  --tw-delay: 0.33s;
  --tw-base: 0.35;
}

@media (prefers-reduced-motion: reduce) {
  .hero__twinkle-star {
    animation: none;
    opacity: 0.45;
    transform: scale(var(--tw-base));
  }

  .hero__actions .btn--primary::before,
  .hero__actions .btn--ghost:hover::before {
    animation: none;
    background-size: 100% 100%;
    background-position: 0% 50%;
  }
}

@keyframes hero-h1-gradient-shift {
  0% {
    background-position: 0% 50%;
  }

  100% {
    background-position: 100% 50%;
  }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__mark {
  margin: 0 auto 16px;
  display: flex;
  justify-content: center;
}

.hero__mark-svg {
  width: clamp(88px, 22vw, 140px);
  height: clamp(88px, 22vw, 140px);
  display: block;
  margin: 0 auto;
  border: 0;
  vertical-align: middle;
  pointer-events: none;
}

.hero__mark img {
  width: clamp(88px, 22vw, 140px);
  height: auto;
  display: block;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fff;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.55);
}

.hero__lead {
  margin: 0 0 36px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  text-shadow: 0 1px 16px rgba(0, 0, 0, 0.45);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.hero__actions .btn {
  font-weight: 600;
}

/* 首屏按钮：流动光影；周期约为原先 3.3 倍 ≈ 30% 速度 */
/* 两键互斥：悬停「了解产品」时主按钮用透明风并停动画；只保留一个流动特效 */
.hero__actions .btn--primary {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid transparent;
  background: none;
  /* 彩虹底动画开启时（默认）：深色字 */
  color: #111;
  box-shadow: 0 10px 44px rgba(40, 110, 210, 0.28), 0 4px 18px rgba(40, 110, 210, 0.18);
  transition: color 1.1s ease, background 1.1s ease, box-shadow 1.1s ease, border-color 1.1s ease;
}

.hero__actions .btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  opacity: 1;
  transition: opacity 1.1s ease;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.hero__actions .btn--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.1s ease;
}

.hero__actions:has(.btn--ghost:hover) .btn--primary {
  /* 悬停副键时主键关掉彩虹底 = 无特效：白字 */
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  box-shadow: none;
}

.hero__actions:has(.btn--ghost:hover) .btn--primary::before,
.hero__actions:has(.btn--ghost:hover) .btn--primary::after {
  animation: none;
  opacity: 0;
}

.hero__actions .btn--primary:hover,
.hero__actions .btn--primary:focus-visible {
  color: #111;
  box-shadow: 0 12px 52px rgba(50, 130, 230, 0.32), 0 6px 26px rgba(50, 130, 230, 0.2);
}

.hero__actions:has(.btn--ghost:hover) .btn--primary:hover,
.hero__actions:has(.btn--ghost:hover) .btn--primary:focus-visible {
  color: #fff;
  box-shadow: none;
}

.hero__actions .btn--ghost {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  /* 默认无底彩虹动画：白字 */
  color: #fff;
  transition: color 0.25s, border-color 0.25s, box-shadow 0.25s, background 0.25s;
}

.hero__actions .btn--ghost::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  opacity: 0;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  background-position: 0% 50%;
  transition: opacity 0.3s;
}

.hero__actions .btn--ghost::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.hero__actions .btn--ghost:hover {
  /* 悬停出现彩虹底动画：黑字 */
  color: #111;
  border-color: rgba(120, 180, 255, 0.45);
  background: transparent;
  box-shadow: 0 10px 40px rgba(40, 100, 200, 0.22), 0 4px 20px rgba(40, 100, 200, 0.14);
}

/* 仅当主按钮未被悬停时，副按钮才展示流动特效；主键悬停时副键关掉彩虹 = 无特效：白字 */
.hero__actions:has(.btn--primary:hover) .btn--ghost:hover {
  color: #fff;
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: none;
}

.hero__actions:has(.btn--primary:hover) .btn--ghost:hover::before,
.hero__actions:has(.btn--primary:hover) .btn--ghost:hover::after {
  opacity: 0;
  animation: none;
}

.hero__actions .btn--ghost:hover::before {
  opacity: 1;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.hero__actions .btn--ghost:hover::after {
  opacity: 0;
}

@media (prefers-reduced-motion: reduce) {
  .hero__actions .btn--primary::before,
  .hero__actions .btn--primary::after,
  .hero__actions .btn--ghost:hover::before,
  .hero__actions .btn--ghost:hover::after,
  .hero__actions:has(.btn--primary:hover) .btn--ghost:hover::before,
  .hero__actions:has(.btn--primary:hover) .btn--ghost:hover::after {
    animation: none;
  }

  .hero__actions .btn--primary::before,
  .hero__actions .btn--ghost:hover::before {
    background-size: 100% 100%;
  }
}

.hero__note {
  margin-top: 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
}

/* —— 首页 B 站双视频 —— */
.home-videos {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.home-videos__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
  max-width: 880px;
  margin: 0 auto;
}

.home-videos__embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 12px;
  background: #000;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.home-videos__embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.home-videos + .section {
  padding-top: 48px;
}

/* —— 区块 —— */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 80px 24px;
}

.section--light {
  background: var(--bg-deep);
  color: var(--text);
  max-width: none;
  padding: 80px max(24px, calc(50% - 600px));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: visible;
}

.section--light .section__inner {
  max-width: var(--max);
  margin: 0 auto;
  overflow: visible;
}

.section--light h2,
.section--light h3 {
  color: var(--text);
}

.section--light p,
.section--light .muted {
  color: var(--text-dim);
}

.section__head {
  text-align: center;
  margin-bottom: 48px;
}

.section__head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section__head p {
  margin: 0;
  font-size: 15px;
  color: var(--text-dim);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section--light .section__head p {
  color: var(--text-dim);
}

/* —— 卡片栅格 —— */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: rgba(77, 163, 255, 0.25);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
}

.card--why {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 24px 26px;
}

.card--why__icon {
  flex-shrink: 0;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.card--why__icon svg {
  width: 48px;
  height: 48px;
  display: block;
  fill: #fff;
}

.card--why h3 {
  text-align: center;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.65;
}

.card--why p + p {
  margin-top: 0.7em;
}

.card__why-hint {
  margin: 0.85em 0 0.4em;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.card__why-list {
  margin: 0 0 0.75em;
  padding-left: 1.2em;
  font-size: 14px;
  line-height: 1.62;
  color: var(--text-dim);
}

.card__why-list li {
  margin-bottom: 0.42em;
}

.card__why-list li:last-child {
  margin-bottom: 0;
}

.card--why .card__why-list + p {
  margin-top: 0.65em;
}

/* 「浅色区」已改为与全站统一的深色 */
.section--light .card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.section--light .card--why {
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.section--light .card--why:hover {
  border-color: transparent;
  transform: none;
}

.section--light .card p {
  color: var(--text-dim);
}

.section--light .card__why-list {
  color: var(--text-dim);
}

.section--light .card__why-hint {
  color: var(--text);
}

.index-cta {
  text-align: center;
  max-width: 560px;
  margin: 40px auto 0;
}

/* —— 数据条 —— */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 40px;
  padding: 48px 24px 56px;
  max-width: var(--max);
  margin: 0 auto;
  box-sizing: border-box;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  align-items: start;
  text-align: center;
}

.stat {
  min-width: 0;
  text-align: center;
}

.stat__num {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1.12;
  font-feature-settings: "tnum" 1;
}

.stat__sub {
  margin: 6px 0 0;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.stat__label {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-top: 8px;
  line-height: 1.45;
  max-width: 16em;
  margin-left: auto;
  margin-right: auto;
}

/* 首页首屏内数据条：叠在封面背景上，无独立底栏容器 */
.hero .hero__stats {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--max);
  /* 整体下移约一整块数据条高度（此前独立栏约 ~170px 量级） */
  margin: clamp(120px, 22vh, 200px) 0 0;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

@media (max-width: 700px) {
  .hero .hero__stats {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.hero .hero__stats .stat__num {
  color: #fff;
}

.hero .hero__stats .stat__label {
  color: rgba(255, 255, 255, 0.62);
  font-weight: 400;
}

.hero .hero__stats .stat__sub {
  color: rgba(255, 255, 255, 0.62);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* —— 页脚 —— */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #050505;
  padding: 28px 0;
  margin-top: 48px;
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px 24px;
  padding-bottom: 36px;
}

.site-footer__heading {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li + li {
  margin-top: 10px;
}

.site-footer__links a {
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.15s;
}

.site-footer__links a:hover {
  color: var(--text);
}

.site-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-dim);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.site-footer__social-link:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.04);
}

.site-footer__bar {
  display: flex;
  justify-content: center;
  padding-top: 0;
}

.site-footer__line {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0;
  font-size: 13px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.45);
}

.site-footer__line a,
.site-footer__line span:not(.site-footer__sep) {
  font-size: inherit;
  color: inherit;
}

.site-footer__line a {
  text-decoration: none;
}

.site-footer__line a:hover {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: underline;
}

.site-footer__sep {
  margin: 0 0.25em;
}

.terms-page {
  padding: 32px 24px 0;
}

.legal-doc {
  max-width: 860px;
  margin: 0 auto 24px;
  background: #fff;
  color: #1f2329;
  border-radius: 8px;
  padding: 36px 44px 48px;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08);
}

.legal-doc__title {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 20px;
  line-height: 1.35;
}

.legal-doc__body h2 {
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 12px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.legal-doc__body p {
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 10px;
}

.legal-line {
  display: flex;
  gap: 0.35em;
  align-items: flex-start;
}

.legal-num {
  flex-shrink: 0;
  min-width: 1.6em;
  font-weight: 600;
}

.legal-line--l1,
.legal-line--l2 {
  display: block;
  padding-left: 2em;
  position: relative;
}

.legal-line--l1::before,
.legal-line--l2::before {
  content: "";
  position: absolute;
  left: 0.65em;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #1f2329;
}

.legal-line--square {
  padding-left: 3.25em;
}

.legal-line--square::before {
  left: 2em;
  border-radius: 0;
  width: 4px;
  height: 4px;
}

@media (max-width: 900px) {
  .legal-doc {
    padding: 24px 18px 32px;
  }
}

/* —— 子页面通用 —— */
.page-hero {
  padding: 56px 24px 40px;
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}

.page-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
}

.product-page .page-hero h1 {
  font-size: 60px;
  transform: rotate(360deg);
}

.page-hero p {
  margin: 0;
  color: var(--text-dim);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.page-hero p a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.subpage {
  padding-bottom: 64px;
}

.sub-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 28px;
}

.sub-section h2 {
  font-size: 1.15rem;
  margin: 0 0 12px;
  font-weight: 600;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  color: var(--text);
}

body[data-page="education"] .sub-section h2 {
  text-align: center;
  padding-left: 0;
  border-left: none;
}

body[data-page="education"] .sub-section + .sub-section {
  margin-top: 50px;
}

body[data-page="education"] .page-hero,
body[data-page="education"] .sub-hero-strip,
body[data-page="education"] .sub-section {
  position: relative;
  z-index: 2;
  background: var(--bg-deep);
}

body[data-page="support"] .sub-section h2 {
  text-align: center;
  padding-left: 0;
  border-left: none;
}

body[data-page="support"] .sub-section + .sub-section {
  margin-top: 50px;
}

body[data-page="support"] .page-hero,
body[data-page="support"] .sub-section {
  position: relative;
  z-index: 2;
  background: var(--bg-deep);
}

body[data-page="support"] .page-hero p {
  max-width: 960px;
}

.support-cards-section {
  margin-top: 8px;
}

.support-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.support-card {
  display: flex;
  flex-direction: column;
  min-height: 210px;
  padding: 22px 22px 20px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, background 0.2s;
}

.support-card:hover {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.04);
}

button.support-card {
  width: 100%;
  font: inherit;
  cursor: pointer;
  text-align: left;
  appearance: none;
}

.support-card__desc {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text-dim);
}

.support-card__foot {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
}

.support-card__icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.support-card__icon svg {
  display: block;
  flex-shrink: 0;
}

.support-card__icon--support {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: none;
}

.support-card__icon--support::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.support-card__icon--support svg {
  position: relative;
  z-index: 1;
}

.support-card__title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.support-card__tag {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.52);
  line-height: 1.4;
}

.support-topics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.support-topic {
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  background: transparent;
}

.support-topic h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
}

.support-topic p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

body[data-page="support"] .sub-steps > li {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

body[data-page="support"] .sub-steps > li::before {
  background: #fff;
  color: #111;
}

body[data-page="support"] .sub-link-grid a {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  text-align: center;
}

body[data-page="support"] .sub-link-grid a:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

body[data-page="support"] .sub-contact,
body[data-page="support"] .sub-panel {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

body[data-page="support"] .sub-cta-row .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

body[data-page="support"] .sub-cta-row .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

body[data-page="support"] .sub-cta-row .btn--ghost {
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}

body[data-page="support"] .sub-cta-row .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

@media (max-width: 960px) {
  .support-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .support-cards,
  .support-topics {
    grid-template-columns: 1fr;
  }
}

.edu-stats-rotator {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 48px auto 56px;
  padding: 0;
  height: 360px;
  text-align: center;
  isolation: isolate;
  overflow: hidden;
}

.edu-stats-rotator::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: 0;
  z-index: -2;
  background: url("../img/edu/starriver.png") center / cover no-repeat;
  pointer-events: none;
}

.edu-stats-rotator::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: 0;
  z-index: -1;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(0, 0, 0, 0.38) 28%,
    rgba(0, 0, 0, 0.22) 50%,
    rgba(0, 0, 0, 0.38) 72%,
    rgba(0, 0, 0, 0.92) 100%
  );
  pointer-events: none;
}

.edu-stats-rotator > * {
  position: relative;
  z-index: 1;
}

.edu-stats-rotator__viewport {
  position: absolute;
  top: 56px;
  left: 24px;
  right: 24px;
  bottom: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.edu-stats-rotator__slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.28em;
  margin: 0;
  padding: 0 8px;
  font-size: clamp(1.2rem, 2.8vw, 1.65rem);
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.33s ease, transform 0.33s ease, visibility 0.33s ease;
}

.edu-stats-rotator__slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.edu-stats-rotator__slide--note {
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  font-weight: 700;
}

.edu-stats-rotator__num {
  display: inline-block;
  padding: 0.08em 0.42em;
  border-radius: var(--radius-pill, 999px);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  background: #fff;
  color: #0a0a0a;
  box-shadow: 0 4px 20px rgba(50, 130, 230, 0.22);
}

.sub-section p,
.sub-section li {
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
}

.spark-intro {
  text-align: center;
}

.spark-intro p {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.spark-intro p + p {
  margin-top: 14px;
}

.page-hero--spark {
  padding-bottom: 28px;
}

.spark-hero__title {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
}

.spark-hero__eyebrow,
.spark-hero__name {
  display: block;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
}

.spark-hero__eyebrow {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.spark-hero__name {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.spark-showcases {
  max-width: var(--max);
  margin: 0 auto;
  padding: 8px 24px 56px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.spark-showcase {
  display: grid;
  grid-template-columns: 306px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  min-height: 418px;
  padding: 22px 28px;
  border-radius: 4px;
  background: #fff;
  color: #111;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.spark-showcase--light,
.spark-showcase--dark {
  background: #fff;
  color: #111;
}

.spark-showcase__aside {
  display: grid;
  grid-template-rows: 165px minmax(0, 1fr) 38px;
  gap: 14px;
  height: 374px;
  min-width: 0;
}

.spark-showcase__brand {
  display: block;
  width: 100%;
  height: 165px;
  object-fit: cover;
  object-position: center;
  border-radius: 2px;
  background: #fff;
}

.spark-showcase__copy {
  min-height: 0;
  overflow: hidden;
}

.spark-showcase__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.spark-showcase__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(0, 0, 0, 0.72);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  overflow: hidden;
}

.spark-showcase__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 38px;
  padding: 8px 18px;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 2px;
  transition: opacity 0.2s, background 0.2s, border-color 0.2s;
}

.spark-showcase__btn:hover {
  opacity: 0.9;
}

.spark-showcase__btn--outline,
.spark-showcase__btn--solid {
  color: #4a8fd4;
  background: transparent;
  border: 1px solid #4a8fd4;
}

.spark-showcase__media {
  height: 374px;
  overflow: hidden;
  border-radius: 2px;
  background: #111;
}

.spark-showcase__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

@media (max-width: 900px) {
  .spark-showcase {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 20px 18px;
  }

  .spark-showcase__aside {
    height: auto;
    grid-template-rows: 165px auto 38px;
  }

  .spark-showcase__media {
    height: clamp(220px, 56vw, 374px);
  }
}

.spark-join-cta {
  max-width: var(--max);
  margin: 0 auto;
  padding: 8px 24px 56px;
  text-align: center;
}

body[data-page="spark"] .spark-join-cta .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

body[data-page="spark"] .spark-join-cta .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

.spark-join-dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  max-width: min(360px, calc(100% - 32px));
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.spark-join-dialog::backdrop {
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.spark-join-dialog img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.sub-list {
  margin: 0 0 16px;
  padding-left: 1.2em;
}

.sub-list li {
  margin-bottom: 0.5em;
}

.sub-note {
  font-size: 14px;
  color: var(--text-dim);
  margin: 0 0 16px;
  line-height: 1.65;
}

.sub-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.sub-partner-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.sub-partner-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.sub-partner-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

.sub-contact {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-top: 8px;
}

.sub-contact p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

.sub-contact p:last-child {
  margin-bottom: 0;
}

.sub-cta-row {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.sub-hero-strip {
  max-width: var(--max);
  margin: -8px auto 32px;
  padding: 0 24px;
}

.sub-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 12px;
}

@media (max-width: 720px) {
  .sub-stat-row {
    grid-template-columns: 1fr;
  }
}

.sub-stat {
  background: none;
  border: none;
  border-radius: 0;
  padding: 18px 16px;
  text-align: center;
}

.sub-stat__val {
  display: block;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 6px;
}

.sub-stat__lbl {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.45;
}

.sub-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  padding: 14px 16px;
  margin: 0 0 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  list-style: none;
}

.sub-toc a {
  font-size: 14px;
  color: var(--accent);
  text-decoration: none;
}

.sub-toc a:hover {
  text-decoration: underline;
}

.sub-steps {
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
  counter-reset: substep;
}

.sub-steps > li {
  counter-increment: substep;
  position: relative;
  padding: 16px 16px 16px 52px;
  margin-bottom: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.sub-steps > li::before {
  content: counter(substep);
  position: absolute;
  left: 14px;
  top: 14px;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: 8px;
}

.sub-steps strong {
  display: block;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 6px;
}

.sub-steps p {
  margin: 0;
  font-size: 14px;
}

.sub-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-top: 10px;
}

.sub-panel h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.sub-panel .sub-list {
  margin-bottom: 0;
}

.edu-mat h3 {
  margin: 28px 0 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.edu-mat h3:first-child {
  margin-top: 0;
}

.edu-mat__item {
  border-bottom: 1px solid var(--border);
}

.edu-mat__item:first-of-type {
  border-top: 1px solid var(--border);
}

.edu-mat__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  user-select: none;
}

.edu-mat__summary::-webkit-details-marker {
  display: none;
}

.edu-mat__summary::marker {
  content: "";
}

.edu-mat__summary:focus {
  outline: none;
}

.edu-mat__summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.edu-mat__chev {
  flex-shrink: 0;
  width: 0.55em;
  height: 0.55em;
  margin-top: 0.12em;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  opacity: 0.75;
}

.edu-mat__item[open] .edu-mat__chev {
  transform: rotate(-135deg);
  margin-top: 0.28em;
}

.edu-mat__panel {
  padding: 0 0 16px;
}

.edu-mat p {
  margin: 0 0 12px;
}

.edu-mat__path {
  font-size: 14px;
  line-height: 1.72;
}

.edu-mat__fig {
  margin: 16px 0 24px;
  text-align: center;
}

.edu-mat__fig img {
  display: block;
  max-width: min(100%, 640px);
  height: auto;
  margin: 0 auto;
}

.edu-pioneer__ways {
  margin-top: 8px;
}

.edu-pioneer__note {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

.edu-pioneer__cta {
  margin-top: 24px;
}

.edu-pioneer__cta .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

.edu-pioneer__cta .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

.edu-faq__list {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(3, auto);
  grid-auto-flow: column;
  gap: 0 48px;
  align-items: start;
}

.edu-faq__list .edu-mat__item:nth-child(4) {
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .edu-faq__list {
    max-width: 720px;
    grid-template-columns: 1fr;
    grid-template-rows: none;
    grid-auto-flow: row;
    gap: 0;
  }

  .edu-faq__list .edu-mat__item:nth-child(4) {
    border-top: none;
  }
}

.edu-faq__list .edu-mat__panel a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.edu-faq__list .edu-mat__panel a:hover {
  opacity: 0.88;
}

.edu-pioneer-dialog,
.business-cooperation-dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  max-width: min(360px, calc(100% - 32px));
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.edu-pioneer-dialog::backdrop,
.business-cooperation-dialog::backdrop {
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.edu-pioneer-dialog img,
.business-cooperation-dialog img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.sub-ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.72;
}

.sub-ol li {
  margin-bottom: 0.45em;
}

.sub-video-feature {
  margin-top: 14px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
  max-height: 420px;
  background: #000;
}

.sub-video-feature iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.sub-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.sub-link-grid a {
  display: block;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.sub-link-grid a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.sub-qq-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.sub-qq-row code {
  font-family: ui-monospace, monospace;
  font-size: 1.1rem;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  color: var(--text);
}

.sub-copy-btn {
  font: inherit;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 13px;
}

.sub-copy-btn:hover {
  background: rgba(255, 255, 255, 0.06);
}

.sub-copy-btn.is-copied {
  border-color: #3ecf8e;
  color: #3ecf8e;
}

.sub-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  padding: 10px 20px;
  border-radius: 999px;
  background: rgba(30, 30, 40, 0.92);
  color: #fff;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.sub-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.sub-value-card {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.sub-value-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--text);
}

.sub-value-card p {
  margin: 0;
  font-size: 14px;
}

.sub-partner-card .sub-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-dim);
}

.tutorial-page__cta {
  max-width: var(--max);
  margin: 0 auto;
  padding: 8px 24px 56px;
  text-align: center;
}

body[data-page="support"] .support-tutorials-section .tutorial-page__cta .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

body[data-page="support"] .support-tutorials-section .tutorial-page__cta .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

body[data-page="support"] .support-tutorials-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

body[data-page="support"] .support-tutorials-section h2 {
  font-size: 36px;
}

body[data-page="support"] .support-tutorials-section__lead {
  margin: 0 auto 28px;
  max-width: 640px;
  text-align: center;
  font-size: 15px;
  line-height: 1.68;
  color: var(--text-dim);
}

dialog.support-contact-dialog {
  border: none;
  border-radius: 16px;
  padding: 0;
  max-width: min(980px, calc(100% - 32px));
  width: calc(100% - 32px);
  background: #f3f4f6;
  color: #111;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

dialog.support-contact-dialog::backdrop {
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.support-contact-dialog__inner {
  position: relative;
  padding: 28px 24px 32px;
}

.support-contact-dialog__close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  color: #333;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.support-contact-dialog__close:hover {
  background: rgba(0, 0, 0, 0.12);
}

.support-contact-dialog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.support-contact-dialog__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  padding: 24px 18px 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.support-contact-dialog__qr {
  display: block;
  flex-shrink: 0;
  width: min(220px, 100%);
  height: 220px;
  object-fit: contain;
  margin: 0 auto 18px;
}

.support-contact-dialog__foot {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  margin-top: auto;
}

.support-contact-dialog__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.support-contact-dialog__meta {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.support-contact-dialog__meta strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: #111;
  margin: 0;
  min-height: calc(1.35em * 1);
}

.support-contact-dialog__meta span {
  display: block;
  font-size: 14px;
  line-height: 1.45;
  color: #609ee9;
  min-height: calc(1.45em * 1);
}

.support-contact-dialog__meta p {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: #52616f;
}

body[data-page="contact"] .support-contact-dialog__foot {
  min-height: 118px;
}

body[data-page="contact"] .support-contact-dialog__meta p {
  min-height: calc(1.5em * 3);
}

@media (max-width: 820px) {
  .support-contact-dialog__grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }
}

body[data-page="support"] .support-tutorials-section .tutorial-root,
body[data-page="support"] .support-tutorials-section .tutorial-page__cta,
body[data-page="support"] .support-tutorials-section .tutorial-page__err {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

body[data-page="support"] .support-tutorials-section .tutorial-page__cta {
  padding-bottom: 0;
}

body[data-page="support"] .support-tutorials-section .tutorial-root {
  padding-bottom: 24px;
}

.tutorial-page__err {
  max-width: var(--max);
  margin: 0 auto 16px;
  padding: 0 24px;
  color: #f07178;
  font-size: 14px;
}

.tutorial-root {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 32px;
  box-sizing: border-box;
}

.tutorial-hub {
  margin-top: 8px;
}

.tutorial-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 18px;
  margin-bottom: 36px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tutorial-filters__tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.tutorial-filter__btn {
  margin: 0;
  padding: 7px 16px;
  font: inherit;
  font-size: 14px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.78);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.tutorial-filter__btn:hover {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.tutorial-filter__btn.is-active {
  background: #fff;
  border-color: #fff;
  color: #111;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tutorial-grid__empty {
  grid-column: 1 / -1;
  margin: 24px 0 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
}

.tutorial-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.tutorial-card[hidden] {
  display: none;
}

.tutorial-card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.tutorial-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #101018;
  overflow: hidden;
}

.tutorial-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.tutorial-card__link:focus-visible {
  outline: 2px solid rgba(120, 160, 255, 0.85);
  outline-offset: 2px;
  border-radius: 12px 12px 0 0;
}

.tutorial-card__media--missing {
  background: linear-gradient(145deg, #1a1a24, #101018);
}

.tutorial-card__cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s;
}

.tutorial-card:hover .tutorial-card__cover {
  transform: scale(1.03);
}

.tutorial-card__play {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
}

.tutorial-card__play svg {
  display: block;
  flex-shrink: 0;
}

.tutorial-card:hover .tutorial-card__play {
  opacity: 1;
}

.tutorial-card__link:hover .tutorial-card__play {
  transform: translate(-50%, -50%) scale(1.05);
}

.tutorial-card__body {
  padding: 12px 14px 14px;
}

.tutorial-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
}

.tutorial-card__tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  line-height: 1.4;
  color: #111;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
}

.tutorial-card__source {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.42);
}

.tutorial-card__source::before {
  content: "·";
  margin-right: 8px;
  color: rgba(255, 255, 255, 0.25);
}

.tutorial-card--playing .tutorial-card__body {
  display: none;
}

.tutorial-card--playing .tutorial-card__media {
  aspect-ratio: 16 / 9;
  cursor: default;
}

.tutorial-card__iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 960px) {
  .tutorial-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .tutorial-root {
    padding-left: 16px;
    padding-right: 16px;
  }

  .tutorial-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-card__play {
    opacity: 1;
  }
}

.product-icon-marquee {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0 0 36px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.product-icon-marquee__row {
  overflow: hidden;
  width: 100%;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.product-icon-marquee__track {
  display: flex;
  width: max-content;
  will-change: transform;
}

.product-icon-marquee__row--left .product-icon-marquee__track {
  animation: product-icon-marquee-left 152s linear infinite;
}

.product-icon-marquee__row--right .product-icon-marquee__track {
  animation: product-icon-marquee-right 152s linear infinite;
}

.product-icon-marquee__row:nth-child(1) .product-icon-marquee__track {
  animation-duration: 172s;
}

.product-icon-marquee__row:nth-child(2) .product-icon-marquee__track {
  animation-duration: 134s;
}

.product-icon-marquee__row:nth-child(3) .product-icon-marquee__track {
  animation-duration: 160s;
}

.product-icon-marquee__row:nth-child(4) .product-icon-marquee__track {
  animation-duration: 142s;
}

.product-icon-marquee__row:nth-child(5) .product-icon-marquee__track {
  animation-duration: 182s;
}

.product-icon-marquee__row:hover .product-icon-marquee__track {
  animation-play-state: paused;
}

.product-icon-marquee__set {
  display: flex;
  flex: 0 0 auto;
}

.product-icon-marquee__set img {
  flex: 0 0 auto;
  width: clamp(52px, 8.8vw, 104px);
  height: clamp(52px, 8.8vw, 104px);
  object-fit: contain;
  padding: 6px 10px;
  box-sizing: border-box;
  opacity: 0.92;
}

@keyframes product-icon-marquee-left {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

@keyframes product-icon-marquee-right {
  0% {
    transform: translateX(-50%);
  }
  100% {
    transform: translateX(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .product-icon-marquee__track {
    animation: none !important;
  }
}

.content-block {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.content-block p {
  color: var(--text-dim);
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.85;
}

.content-block h2 {
  color: var(--text);
  font-size: 1.25rem;
  margin: 2em 0 0.75em;
  font-weight: 600;
}

.content-block h3 {
  color: var(--text);
  font-size: 1.05rem;
  margin: 1.5em 0 0.5em;
  font-weight: 600;
}

.content-block ul {
  margin: 0 0 1.15em;
  padding-left: 1.25em;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.75;
}

.content-block li {
  margin-bottom: 0.35em;
}

.prose-light {
  background: var(--bg-mute);
  color: var(--text-dark);
  max-width: none;
}

.prose-light .content-block p {
  color: var(--text-muted);
}

.prose-light .content-block h2 {
  color: var(--text-dark);
}

/* —— 产品介绍页（分块、目录、卡片，避免整页密文） —— */
.product-page {
  padding-bottom: 48px;
}

.section--product-prelude {
  padding-top: 8px;
  padding-bottom: 40px;
}

.section--product-prelude .section__head {
  margin-bottom: 28px;
}

.section--before-example-marquee {
  padding-top: 20px;
  padding-bottom: 0;
}

.section--before-example-marquee .section__head {
  margin-bottom: 16px;
}

.product-kpi {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 8px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 20px;
}

.product-kpi__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-dim);
}

.product-kpi__item strong {
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.product-toc {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 24px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  justify-content: center;
  background: linear-gradient(180deg, var(--bg-deep) 60%, rgba(7, 10, 15, 0.92) 100%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.product-toc__tab {
  font: inherit;
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.45);
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  transition: color 0.2s, background 0.2s, border-color 0.2s, opacity 0.2s;
}

.product-toc__tab:hover {
  color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.08);
  border-color: transparent;
}

.product-toc__tab[aria-selected="true"] {
  color: #111;
  border-color: rgba(255, 255, 255, 0.9);
  background: #fff;
  box-shadow: none;
}

.product-toc__tab[aria-selected="true"]:hover {
  color: #111;
  background: #fff;
  opacity: 0.92;
}

.product-panels {
  min-height: 200px;
}

.product-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.product-tabpanel .product-block {
  margin-top: 0;
  scroll-margin-top: calc(var(--header-h) + 48px);
}

.product-tabpanel {
  padding-top: 8px;
}

.product-block h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  line-height: 1.35;
}

.product-block__sub {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.5;
  max-width: 52ch;
}

.product-lead {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 0;
}

.product-lead p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.product-lead p:last-child {
  margin-bottom: 0;
}

.product-lead--with-logo {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 24px;
  align-items: flex-start;
}

.product-lead__logo {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-lead__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-lead__body {
  flex: 1;
  min-width: min(100%, 260px);
}

.product-tabpanel .p-card__brand-img {
  display: block;
  max-height: 44px;
  width: auto;
  max-width: 100%;
  margin-bottom: 12px;
  object-fit: contain;
  object-position: left center;
}

.product-tabpanel .p-card__brand-img--cad {
  max-height: 36px;
}

.product-tabpanel .p-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-tabpanel .p-card__icon {
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.88);
}

.product-tabpanel .p-card__title-text {
  flex: 1;
  min-width: 0;
}

.product-callout {
  margin-top: 16px;
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: none;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.82);
}

/* 产品介绍各 tab：弱化灰字改为纯白；副标题取消 52ch 限制以便单行展示 */
.product-tabpanel .product-block__sub {
  color: #fff;
  max-width: none;
}

.product-tabpanel .product-lead p {
  color: #fff;
}

.product-tabpanel .product-callout {
  color: #fff;
}

.product-tabpanel .p-card p,
.product-tabpanel .p-card--list ul,
.product-tabpanel .p-card--list li {
  color: #fff;
}

/* 概览 tab：案例图双行横向循环（通栏、每行最多 5 张、反向滚动） */
.product-example-marquee {
  margin-top: 28px;
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  overflow: hidden;
  border: none;
  border-radius: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.product-example-marquee__row {
  overflow: hidden;
}

.product-example-marquee__track {
  display: flex;
  width: max-content;
  will-change: transform;
}

.product-example-marquee__row--left .product-example-marquee__track {
  animation: product-example-marquee-left 88s linear infinite;
}

.product-example-marquee__row--right .product-example-marquee__track {
  animation: product-example-marquee-right 96s linear infinite;
}

.product-example-marquee__row:hover .product-example-marquee__track {
  animation-play-state: paused;
}

.product-example-marquee__set {
  display: flex;
  flex: 0 0 auto;
  align-items: stretch;
  gap: 36px;
  padding: 20px max(14px, env(safe-area-inset-right)) 20px max(14px, env(safe-area-inset-left));
  box-sizing: border-box;
}

.product-example-marquee__cell {
  flex: 0 0 auto;
  width: min(760px, calc((100vw - 100px) / 2.5));
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-deep);
  box-sizing: border-box;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.product-example-marquee__cell img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border: none;
  border-radius: 0;
  margin: 0;
  padding: 0;
  user-select: none;
  pointer-events: none;
}

.product-example-marquee__cell--case {
  position: relative;
  cursor: pointer;
  outline: none;
}

.product-example-marquee__cell--case:focus-visible {
  box-shadow: 0 0 0 2px var(--bg-deep), 0 0 0 4px rgba(77, 163, 255, 0.65);
}

.product-example-marquee__inner {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  border-radius: inherit;
  transition: filter 0.3s ease;
}

.product-example-marquee__hover {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: stretch;
  padding: 14px 16px 16px;
  box-sizing: border-box;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.84) 0%,
    rgba(0, 0, 0, 0.28) 42%,
    transparent 72%
  );
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}

.product-example-marquee__hover-title {
  font-size: clamp(13px, 1.35vw, 17px);
  font-weight: 600;
  color: #fff;
  line-height: 1.35;
  margin: 0 0 6px;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.65);
}

.product-example-marquee__hover-hint {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}

.product-example-marquee__cell--case:hover .product-example-marquee__hover,
.product-example-marquee__cell--case:focus-visible .product-example-marquee__hover {
  opacity: 1;
}

.product-example-marquee__cell--case:hover .product-example-marquee__inner,
.product-example-marquee__cell--case:focus-visible .product-example-marquee__inner {
  filter: drop-shadow(0 0 4px rgba(180, 235, 255, 1))
    drop-shadow(0 0 14px rgba(100, 200, 255, 0.95))
    drop-shadow(0 0 26px rgba(77, 163, 255, 0.9))
    drop-shadow(0 0 44px rgba(77, 163, 255, 0.65))
    drop-shadow(0 0 64px rgba(77, 163, 255, 0.45))
    drop-shadow(0 0 88px rgba(60, 140, 255, 0.28));
}

.product-example-marquee__cell--case:hover,
.product-example-marquee__cell--case:focus-visible {
  border-color: rgba(150, 220, 255, 0.95);
  box-shadow:
    0 4px 32px rgba(0, 0, 0, 0.45),
    0 0 0 2px rgba(120, 200, 255, 0.75),
    0 0 20px rgba(77, 163, 255, 0.55),
    0 0 40px rgba(77, 163, 255, 0.38),
    0 0 72px rgba(77, 163, 255, 0.22);
}

@keyframes product-example-marquee-left {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

@keyframes product-example-marquee-right {
  0% {
    transform: translateX(-50%);
  }
  100% {
    transform: translateX(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .product-example-marquee__track {
    animation: none !important;
  }
}

/* 工具系列：默认左案例右文案；--mirror 为左文案右案例（移动端统一为先图后文） */
.product-tool-series {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.product-tool-series__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(20px, 4vw, 36px);
  align-items: center;
}

.product-tool-series__grid > .product-tool-series__show {
  order: 1;
}

.product-tool-series__grid > .product-tool-series__copy {
  order: 2;
}

/* 镜像：左文案右案例图；左栏略宽以贴合正文 */
.product-tool-series--mirror .product-tool-series__grid {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
}

.product-tool-series--mirror .product-tool-series__show {
  order: 2;
}

.product-tool-series--mirror .product-tool-series__copy {
  order: 1;
}

.product-tool-series__show {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.14);
  background: var(--bg-deep);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.product-tool-series__show .product-tool-series__media {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--bg-deep);
}

.product-tool-series__show video.product-tool-series__media {
  pointer-events: none;
}

.product-tool-series__show--zoomable {
  cursor: zoom-in;
}

.product-tool-series__show--zoomable:focus-visible {
  outline: 2px solid rgba(120, 160, 255, 0.85);
  outline-offset: 3px;
}

.product-tool-series__copy {
  min-width: 0;
}

.product-tool-series__copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  color: var(--text);
}

.product-tool-series__lead {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
  max-width: 42rem;
}

.product-tool-series__icons {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px 14px;
  align-items: center;
  justify-items: center;
  width: 100%;
  max-width: min(42rem, 100%);
  padding: 14px 16px;
  box-sizing: border-box;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.product-tool-series__icons img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  opacity: 0.92;
}

@media (max-width: 720px) {
  .product-tool-series__grid {
    grid-template-columns: 1fr;
  }

  .product-tool-series--mirror .product-tool-series__grid {
    grid-template-columns: 1fr;
  }

  /* 窄屏统一为先图后文，阅读更直观 */
  .product-tool-series__grid > .product-tool-series__show {
    order: 1 !important;
  }

  .product-tool-series__grid > .product-tool-series__copy {
    order: 2 !important;
  }

  .product-tool-series__icons {
    max-width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.product-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.product-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}

/* 三栏卡片：段落疏朗、标题与正文分区（用于「在做什么」等） */
.product-tabpanel .p-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.product-grid-3--readable {
  gap: 20px;
  margin-top: 0;
}

.product-grid-3--readable .p-card {
  padding: 0;
}

.product-grid-3--readable .p-card h3 {
  margin: 0 0 14px;
  padding-bottom: 0;
  border-bottom: none;
}

.product-grid-3--readable .p-card p {
  line-height: 1.82;
  letter-spacing: 0.01em;
}

.product-grid-3--readable .p-card p + p {
  margin-top: 1.05em;
}

@media (max-width: 720px) {
  .product-grid-2,
  .product-grid-3 {
    grid-template-columns: 1fr;
  }
}

.p-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 18px;
}

.product-tabpanel .product-grid-2 {
  margin-top: 0;
}

.product-tabpanel .product-block .product-grid-2 + .p-card {
  margin-top: 20px;
}

.p-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.p-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.p-card p + p {
  margin-top: 0.75em;
}

.p-card--list ul {
  margin: 0;
  padding-left: 1.1em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.p-card--list li {
  margin-bottom: 0.4em;
}

.product-block .product-grid-2 + .p-card {
  margin-top: 16px;
}

.product-foot {
  text-align: center;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.product-foot__slogan {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.product-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.product-foot .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

.product-foot .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

/* —— 定价表（会员页四列：免费 / 订阅 / 永久 / 子账号） —— */
.pricing.pricing--tiers {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 46px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 48px;
  align-items: stretch;
}

@media (max-width: 1180px) {
  .pricing.pricing--tiers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .pricing.pricing--tiers {
    grid-template-columns: 1fr;
  }
}

.price-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px 28px;
  min-height: 100%;
  box-sizing: border-box;
}

.price-card__foot {
  margin-top: auto;
  padding-top: 8px;
}

.price-card__btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pricing .price-card__btns .btn--block {
  min-height: 48px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}

.price-card h2 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  line-height: 1.25;
  min-height: calc(1.35rem * 1.25);
}

/* 标题下说明行：三卡等高 */
.price-card > h2 + .muted {
  margin: 0 0 12px;
  min-height: 3em;
  line-height: 1.5;
}

.price-card .price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 12px;
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.price-card ul {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  font-size: 15px;
  color: var(--text-dim);
  flex-shrink: 0;
}

.price-card li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.price-card li:last-child {
  border-bottom: none;
}

/* 会员定价四列：统一栅格占位，四卡横向对齐 */
.price-card.price-card--tier {
  overflow: visible;
  display: flex;
  flex-direction: column;
  padding-top: 36px;
  min-height: 100%;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.pricing.pricing--tiers .price-card.price-card--tier {
  padding-left: 0;
  padding-right: 0;
  padding-bottom: 0;
}

.pricing.pricing--tiers .price-card.price-card--featured {
  border: none;
  box-shadow: none;
}

/* 标题区 + 报价区统一高度，便于四列主按钮对齐 */
.price-card--tier .price-card__upper {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  box-sizing: border-box;
  min-height: 23.75rem;
}

.price-card--tier .price-card__lower {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding-top: 8px;
}

@media (max-width: 640px) {
  .price-card--tier .price-card__upper {
    min-height: 0;
  }
}

/* 顶栏：订阅版为丝带，其余为同高透明占位 → 标题/描述/价格横行对齐 */
.price-card__ribbon-slot {
  flex: 0 0 auto;
  box-sizing: border-box;
  min-height: 42px;
  margin: -36px 0 20px;
}

.price-card__ribbon-slot:not(.price-card__ribbon-slot--ribbon) {
  visibility: visible;
}

.price-card__ribbon-slot--ribbon {
  width: calc(100% + 56px);
  margin: -36px -28px 20px -28px;
}

.price-card__ribbon-slot--ribbon .price-card__ribbon {
  margin: 0;
}

.price-card__ribbon {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 11px 18px;
  margin: 0;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #0a1018;
  background: linear-gradient(135deg, #7cc4ff, #4da3ff);
}

.price-card--tier .price-card__title {
  flex: 0 0 auto;
  margin: 0 0 12px;
  padding: 0;
  min-height: 2.85rem;
  font-size: 1.35rem;
  line-height: 1.25;
  font-weight: 600;
}

.price-card--tier .price-card__desc {
  flex: 0 0 auto;
  margin: 0 0 18px;
  min-height: 5em;
  max-height: none;
  line-height: 1.55;
}

/* 订阅版：按月/按年分段 + D5 式左对齐大号价格 */
.price-card.price-card--featured {
  border-color: rgba(120, 180, 255, 0.42);
  box-shadow: 0 0 0 1px rgba(77, 163, 255, 0.1);
}

.price-card--tier .tier-price-block--hero,
.price-card--tier .tier-billing {
  align-self: stretch;
  width: 100%;
  text-align: left;
}

/* 占位：与非订阅卡的「按月/按年」条等高，使 CNY / 大号价对齐 */
.tier-price-toggle-spacer {
  flex: 0 0 auto;
  box-sizing: border-box;
  width: 100%;
  margin: 0 0 14px;
  padding: 3px;
  border: 1px solid transparent;
  border-radius: 10px;
  min-height: 44px;
}

/* flex 会盖住 [hidden]，月/年两个 tabpanel 曾同时显示 */
.tier-price-display[hidden] {
  display: none !important;
}

.tier-billing {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0;
  width: 100%;
}

.tier-billing__toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

.tier-billing__seg {
  margin: 0;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  background: transparent;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}

.tier-billing__seg[aria-selected="true"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.tier-billing__seg:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tier-price-block.tier-price-block--sub {
  margin: 0;
  gap: 6px;
}

.tier-price-currency {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.tier-price-display {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.tier-price-hero {
  margin: 0;
  width: 100%;
  font-size: 2.05rem;
  font-weight: 700;
  line-height: 1.05;
  color: var(--text);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0 6px;
}

.tier-price-hero__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-left: auto;
  color: #fff;
}

.tier-price-hero__icon svg {
  display: block;
  width: 0.825em;
  height: 0.825em;
}

.tier-price-hero__sym {
  font-size: 0.72em;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
}

.tier-price-hero__num {
  color: rgba(255, 255, 255, 0.98);
}

/* 后缀略小于主数字，仍为白色（与订阅版范例一致） */
.tier-price-hero__unit {
  font-size: 0.38em;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
}

.tier-price-hero__compare {
  display: inline-flex;
  align-items: baseline;
  margin-left: 0.15em;
  font-size: 25px;
  font-weight: 500;
  line-height: 1;
  color: rgba(255, 255, 255, 0.55);
}

.tier-price-hero__compare-num {
  text-decoration: line-through;
  color: rgba(255, 255, 255, 0.55);
}

.tier-price-note-muted {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

.tier-price-note-muted strong {
  color: rgba(255, 255, 255, 0.75);
  font-weight: 600;
}

/* 价格区：统一最小高度，次要说明顶对齐 */
.price-card--tier .price-card__upper > .tier-price-block {
  margin-bottom: 0;
}

.tier-price-block {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 8px;
  margin: 0 0 20px;
  min-height: 10.5rem;
}

/* 高于通用 tier-price-block 优先级，会员四卡大号价区域统一高度 */
.price-card--tier .tier-price-block.tier-price-block--hero,
.price-card--tier .tier-price-block.tier-price-block--sub {
  min-height: 9.75rem;
  margin-bottom: 0;
}
.tier-price-main {
  flex: 0 0 auto;
  margin: 0;
  font-size: 1.38rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
}

.tier-price-main strong {
  color: var(--accent);
  font-weight: 700;
}

.tier-price-main--forever .price-forever__num {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--accent);
}

.tier-price-main--addon {
  font-size: 1.5rem;
}

.tier-price-note {
  flex: 0 0 auto;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}



.price-card__cta {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 18px;
  min-height: 58px;
}

.pricing.pricing--tiers .mem-tier-btn {
  min-height: 46px;
  justify-content: center;
  border-radius: var(--radius-pill);
}

.pricing.pricing--tiers .mem-tier-btn.btn--primary {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid transparent;
  background: #fff;
  color: #0a0a0a;
  box-shadow: none;
  transition: color 1.1s ease, background 1.1s ease, box-shadow 1.1s ease, border-color 1.1s ease;
}

.pricing.pricing--tiers .mem-tier-btn.btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.1s ease;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.pricing.pricing--tiers .mem-tier-btn.btn--primary:hover,
.pricing.pricing--tiers .mem-tier-btn.btn--primary:focus-visible {
  background: none;
  color: #111;
  box-shadow: 0 12px 52px rgba(50, 130, 230, 0.32), 0 6px 26px rgba(50, 130, 230, 0.2);
}

.pricing.pricing--tiers .mem-tier-btn.btn--primary:hover::before,
.pricing.pricing--tiers .mem-tier-btn.btn--primary:focus-visible::before {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .pricing.pricing--tiers .mem-tier-btn.btn--primary::before {
    animation: none;
  }

  .pricing.pricing--tiers .mem-tier-btn.btn--primary:hover::before,
  .pricing.pricing--tiers .mem-tier-btn.btn--primary:focus-visible::before {
    background-size: 100% 100%;
  }
}

.mem-tier-btn--secondary {
  font-weight: 500;
}

.mem-tier-includes {
  flex: 0 0 auto;
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.45;
  min-height: 3em;
}

.mem-tier-slot {
  flex: 0 0 auto;
  margin: 0 0 12px;
  min-height: 3em;
}

.mem-tier-features {
  flex: 1 1 auto;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.35;
  color: var(--text-dim);
}

.mem-tier-features li {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 5px 0 5px 24px;
  border-bottom: none;
}

.mem-tier-features--priced li {
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mem-tier-feature__label {
  flex: 1 1 auto;
  min-width: 0;
}

.mem-tier-feature__price {
  flex: 0 0 auto;
  margin-left: auto;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--text-dim);
  text-decoration: line-through;
}

.mem-tier-features li:last-child {
  border-bottom: none;
}

.mem-tier-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 16px;
  height: 16px;
  border: none;
  transform: none;
  opacity: 1;
  flex-shrink: 0;
  background: center / contain no-repeat
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 -960 960 960' fill='%23ffffff'%3E%3Cpath d='m382-324.77 352.08-352.08q5.84-5.84 13.77-6.23 7.92-.38 14.53 6.23 6.62 6.62 6.62 14.27 0 7.66-6.62 14.27l-357.76 358q-9.7 9.69-22.62 9.69-12.92 0-22.62-9.69l-162-162q-5.84-5.84-6.11-13.88-.27-8.04 6.35-14.66 6.61-6.61 14.26-6.61 7.66 0 14.27 6.61L382-324.77Z'/%3E%3C/svg%3E");
}

.mem-tier-features li strong {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 600;
}

.mem-tier-foot {
  flex: 0 0 auto;
  margin-top: auto;
  padding-top: 10px;
  font-size: 12px;
  line-height: 1.55;
}

.mem-tier-foot a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 163, 255, 0.35);
}

.mem-tier-foot a:hover {
  border-bottom-color: var(--accent);
}

.muted {
  color: var(--text-dim);
  font-size: 14px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* —— 会员页：说服条、表格、趋势图 —— */
.mem-hero .mem-hero__lead {
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
  color: var(--text-dim);
  font-size: 16px;
}

.mem-hero__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.mem-hero__sub {
  max-width: 640px;
  margin: 14px auto 0;
  font-size: 14px;
  line-height: 1.6;
}

.mem-hero .mem-hero__lead strong {
  color: var(--text);
  font-weight: 600;
}

.mem-faq {
  max-width: 1280px;
  margin: 0 auto 64px;
  padding: 56px 24px 0;
  border-top: 1px solid var(--border);
  box-sizing: border-box;
}

.mem-faq__inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 46px;
  align-items: start;
}

.mem-faq__title {
  grid-column: 1 / -1;
  margin: 0 0 12px;
  font-size: 21.6px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.mem-faq__list {
  grid-column: 1 / -1;
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(8, auto);
  grid-auto-flow: column;
  gap: 15px;
  align-items: start;
}

@media (max-width: 1180px) {
  .mem-faq__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mem-faq__list {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    grid-auto-flow: row;
    gap: 0;
  }

  .mem-faq__item:nth-child(9) {
    border-top: none;
  }
}

@media (max-width: 640px) {
  .mem-faq__inner {
    grid-template-columns: 1fr;
  }
}

.mem-faq__item {
  scroll-margin-top: calc(var(--header-h) + 16px);
  border-bottom: 1px solid var(--border);
}

.mem-faq__item:first-child,
.mem-faq__item:nth-child(9) {
  border-top: 1px solid var(--border);
}

@media (min-width: 1181px) {
  .mem-faq__item:nth-child(-n+8) .mem-faq__question {
    padding-right: 20px;
  }

  .mem-faq__item:nth-child(n+9) {
    padding-left: 20px;
  }
}

.mem-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 5px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--text);
  user-select: none;
}

.mem-faq__question::-webkit-details-marker {
  display: none;
}

.mem-faq__question::marker {
  content: "";
}

.mem-faq__question:focus {
  outline: none;
}

.mem-faq__question:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.mem-faq__chev {
  flex-shrink: 0;
  width: 0.55em;
  height: 0.55em;
  margin-top: 0.12em;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  opacity: 0.75;
}

.mem-faq__item[open] .mem-faq__chev {
  transform: rotate(-135deg);
  margin-top: 0.28em;
}

.mem-faq__answer {
  padding: 0 0 5px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.mem-faq__answer p {
  margin: 0 0 12px;
}

.mem-faq__answer p:last-child {
  margin-bottom: 0;
}

.mem-faq__answer a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 163, 255, 0.35);
}

.mem-faq__answer a:hover {
  border-bottom-color: var(--accent);
}

.price-badge {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0a1018;
  background: linear-gradient(135deg, #7cc4ff, #4da3ff);
  padding: 5px 10px;
  border-radius: 8px;
}

.price-strap {
  margin: 0 0 8px;
  font-size: 13px;
  color: rgba(77, 163, 255, 0.9);
  font-weight: 500;
}

.price__unit {
  font-size: 0.6em;
  font-weight: 500;
  color: var(--text-dim);
}

.price-note {
  margin: -4px 0 16px;
  font-size: 14px;
  color: var(--text-dim);
}

.price-note strong {
  color: var(--accent);
  font-weight: 600;
}

.price-forever {
  margin: 0 0 16px;
  font-size: 1.1rem;
  color: var(--text-dim);
}

.price-forever__num {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent);
}

.price-forever__tag {
  font-size: 0.8em;
  font-weight: 400;
  color: var(--text-dim);
}

.price-disclaimer {
  margin: 0 0 4px;
  text-align: left;
  line-height: 1.5;
  flex-shrink: 0;
}

.price-daily {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-dim);
}

.price-daily__row {
  margin: 0 0 0.4em;
}

.price-daily__row:last-of-type {
  margin-bottom: 0.3em;
}

.price-daily__row strong {
  color: var(--accent);
  font-weight: 600;
}

.price-daily__hint {
  margin: 0.55em 0 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.45;
}

.price-daily--tight {
  margin: 0 0 16px;
  padding: 0;
  background: none;
  border: none;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.5;
  min-height: 3rem;
  box-sizing: border-box;
}

.price-card .price-forever {
  margin: 0 0 12px;
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.price-card--permanent .price-forever__num {
  font-size: 1.6rem;
}

.price-forever-callout {
  margin: 0 0 16px;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 180, 60, 0.08);
  border: 1px solid rgba(255, 180, 60, 0.22);
  border-radius: 10px;
  min-height: 3.75rem;
  box-sizing: border-box;
}

/* 子账号：主价格后的说明，与订阅「日均」区、永久「说明框」大致对齐 */
.price-card:not(.price-card--featured):not(.price-card--permanent) > .price + .muted {
  margin: 0 0 16px;
  min-height: 3.75rem;
  line-height: 1.6;
  box-sizing: border-box;
}

.price-forever-callout strong {
  color: rgba(255, 220, 160, 0.95);
  font-weight: 600;
}


.mem-history {
  max-width: 1280px;
  margin: 0 auto 48px;
  padding: 0 24px;
  box-sizing: border-box;
}

.mem-trend {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 20px 20px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-sizing: border-box;
}

.mem-trend.mem-trend--embed {
  margin-top: 18px;
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.mem-trend__details {
  margin: 0;
}

.mem-trend__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  padding: 4px 2px 12px;
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  user-select: none;
}

.mem-trend__summary::-webkit-details-marker {
  display: none;
}

.mem-trend__summary::marker {
  content: "";
}

.mem-trend__summary:focus {
  outline: none;
}

.mem-trend__summary:focus-visible {
  outline: 2px solid var(--accent, #e8b923);
  outline-offset: 3px;
  border-radius: 6px;
}

.mem-trend__chev {
  flex-shrink: 0;
  width: 0.55em;
  height: 0.55em;
  margin-top: 0.12em;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  opacity: 0.75;
}

.mem-trend__details[open] .mem-trend__chev {
  transform: rotate(-135deg);
  margin-top: 0.28em;
}

.mem-trend__panel {
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

.mem-trend__note {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-dim);
  text-align: center;
}

.mem-trend.mem-trend--embed .mem-trend__note {
  margin-top: 12px;
  padding-top: 0;
  border-top: none;
  text-align: left;
  font-size: 12px;
}

.mem-trend__h {
  margin: 0 0 16px;
  font-size: 1.35rem;
  font-weight: 600;
  text-align: center;
  color: var(--text);
  letter-spacing: -0.02em;
}

.mem-trend__fig {
  margin: 0;
  padding: 0;
}

.mem-trend__svg {
  display: block;
  width: 100%;
  max-height: 520px;
  height: auto;
}

.mem-trend__ax {
  font-size: 12px;
  font-family: var(--font);
}

.mem-trend__lab {
  font-size: 12px;
  font-family: var(--font);
}

.mem-trend__dot {
  font-size: 10px;
  font-family: var(--font);
}

.mem-trend__val {
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font);
  fill: #e8c04d;
}

.mem-trend.mem-trend--embed .mem-trend__val {
  fill: rgba(255, 255, 255, 0.9);
}

.mem-trend__taxis {
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font);
  fill: rgba(255, 255, 255, 0.65);
}

/* —— 下载弹层 —— */
dialog.download-dialog {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--bg-elevated);
  color: var(--text);
  padding: 0;
  max-width: min(900px, calc(100% - 32px));
  width: calc(100% - 32px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

dialog.download-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

/* —— 会员页：子账号说明弹层 —— */
dialog.mem-addon-dialog {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: #0a0a0a;
  color: #fff;
  padding: 0;
  max-width: min(560px, calc(100% - 32px));
  width: calc(100% - 32px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.65);
  overflow: hidden;
}

dialog.mem-addon-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(4px);
}

.mem-addon-dialog__inner {
  position: relative;
}

.mem-addon-dialog__close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.mem-addon-dialog__close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.mem-addon-dialog__head {
  padding: 28px 56px 0 28px;
}

.mem-addon-dialog__head h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
}

.mem-addon-dialog__lead {
  margin: 0 0 22px;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.88);
}

.mem-addon-dialog__body {
  padding: 0 28px 4px;
  max-height: min(56vh, 420px);
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mem-addon-dialog__block {
  margin-bottom: 22px;
}

.mem-addon-dialog__block:last-child {
  margin-bottom: 8px;
}

.mem-addon-dialog__block h3 {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.5);
}

.mem-addon-dialog__list {
  margin: 0;
  padding-left: 1.15em;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.9);
}

.mem-addon-dialog__list li {
  margin-bottom: 8px;
}

.mem-addon-dialog__list li:last-child {
  margin-bottom: 0;
}

.mem-addon-dialog__list strong {
  color: #fff;
  font-weight: 600;
}

.mem-addon-dialog__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
  padding: 16px 28px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
}

.mem-addon-dialog .btn--ghost {
  border-color: rgba(255, 255, 255, 0.24);
  color: #fff;
  background: transparent;
}

.mem-addon-dialog .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.mem-addon-dialog .btn--primary {
  background: #fff;
  color: #111;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

.mem-addon-dialog .btn--primary:hover {
  opacity: 0.88;
  box-shadow: none;
}

.mem-addon-dialog__btn {
  min-width: 112px;
}



/* —— 案例效果图弹层：固定 16:9 视窗，cover 填充裁剪；文案与翻页叠在图上 —— */
dialog.example-case-dialog {
  border: none;
  padding: 0;
  margin: auto;
  background: transparent;
  color: #fff;
  max-width: none;
  max-height: none;
  width: fit-content;
  height: fit-content;
  overflow: visible;
  box-shadow: none;
}

dialog.example-case-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
}

.example-case-dialog__inner {
  position: relative;
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100vw;
  max-height: 100vh;
}

.example-case-dialog__media {
  position: relative;
  display: block;
  width: min(1520px, calc(100vw - 24px), calc((100vh - 24px) * 16 / 9));
  aspect-ratio: 16 / 9;
  max-width: 100%;
  line-height: 0;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 16px 56px rgba(0, 0, 0, 0.55);
}

.example-case-dialog__media img,
.example-case-dialog__media video.example-case-dialog__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-position: center;
}

.example-case-dialog__media img {
  display: block;
  object-fit: cover;
}

.example-case-dialog__media video.example-case-dialog__video {
  object-fit: contain;
  background: #000;
}

.example-case-dialog__media video.example-case-dialog__video:not([hidden]) {
  display: block;
}

.example-case-dialog__media video.example-case-dialog__video[hidden] {
  display: none !important;
}

.example-case-dialog--tool-showcase .example-case-dialog__nav {
  display: none;
}

.example-case-dialog--tool-showcase .example-case-dialog__counter,
.example-case-dialog--tool-showcase .example-case-dialog__note {
  display: none;
}

.example-case-dialog__close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 4;
  width: 42px;
  height: 42px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.15s;
}

.example-case-dialog__close:hover {
  background: rgba(0, 0, 0, 0.62);
  transform: scale(1.05);
}

.example-case-dialog__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 36px 18px 16px;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.82) 0%,
    rgba(0, 0, 0, 0.35) 55%,
    transparent 100%
  );
  pointer-events: none;
  box-sizing: border-box;
}

.example-case-dialog__caption .example-case-dialog__title,
.example-case-dialog__caption .example-case-dialog__counter,
.example-case-dialog__caption .example-case-dialog__note {
  pointer-events: none;
}

.example-case-dialog__title {
  margin: 0 0 6px;
  padding: 0;
  font-size: clamp(1rem, 2.8vw, 1.2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
  text-align: left;
  color: #fff;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.65);
}

.example-case-dialog__counter {
  margin: 0 0 6px;
  padding: 0;
  text-align: left;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}

.example-case-dialog__note {
  margin: 0;
  padding: 0;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.78);
  text-align: left;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}

.example-case-dialog__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 48px;
  height: 48px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.42);
  color: #fff;
  font-size: 1.85rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.15s;
}

.example-case-dialog__nav--prev {
  left: 12px;
}

.example-case-dialog__nav--next {
  right: 12px;
}

.example-case-dialog__nav:hover {
  background: rgba(0, 0, 0, 0.62);
  transform: translateY(-50%) scale(1.06);
}

@media (max-width: 540px) {
  .example-case-dialog__nav {
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
  }

  .example-case-dialog__nav--prev {
    left: 8px;
  }

  .example-case-dialog__nav--next {
    right: 8px;
  }

  .example-case-dialog__caption {
    padding: 28px 12px 12px;
  }
}

.download-dialog__inner {
  position: relative;
  padding: 0;
}

.download-dialog__dismiss {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text-dim);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.download-dialog__dismiss:hover {
  background: var(--bg-card);
  color: var(--text);
}

.download-dialog__head {
  padding: 26px 48px 20px 28px;
  background: linear-gradient(180deg, rgba(77, 163, 255, 0.08) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
}

.download-dialog__head h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.download-dialog__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.download-dialog__sunset {
  margin: 10px 0 0;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255, 196, 120, 0.95);
  background: rgba(255, 160, 60, 0.08);
  border: 1px solid rgba(255, 180, 90, 0.22);
  border-radius: 8px;
}

.dl-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 8px 20px 24px;
  align-items: stretch;
}

.dl-cols--2 {
  grid-template-columns: repeat(2, 1fr);
}

/* 下载页：浅色扁平弹层 */
dialog.download-dialog.download-dialog--light {
  max-width: min(520px, calc(100% - 32px));
  background: #fafafa;
  color: #1a1a1a;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.14);
}

dialog.download-dialog.download-dialog--light::backdrop {
  background: rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(2px);
}

.download-dialog--light .download-dialog__head {
  padding: 28px 48px 22px 28px;
  background: #fafafa;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.download-dialog--light .download-dialog__head h2 {
  color: #1a1a1a;
  font-size: 1.125rem;
  font-weight: 600;
}

.download-dialog--light .download-dialog__note {
  color: #666;
  font-size: 13px;
  line-height: 1.65;
}

.download-dialog--light .download-dialog__sunset {
  display: block;
  margin-top: 12px;
  color: #9a5b00;
  background: rgba(255, 170, 60, 0.14);
  border: 1px solid rgba(210, 130, 40, 0.35);
}

.download-dialog--light .download-dialog__dismiss {
  color: #999;
}

.download-dialog--light .download-dialog__dismiss:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #333;
}

.download-dialog--light .dl-cols {
  padding: 22px 24px 28px;
  gap: 14px;
}

.download-dialog--light .dl-col {
  min-height: 64px;
  align-items: center;
  justify-content: center;
  padding: 18px 16px;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 10px;
}

.download-dialog--light .dl-col:hover {
  border-color: rgba(0, 0, 0, 0.18);
  background: #f3f3f3;
  box-shadow: none;
  transform: none;
}

.download-dialog--light a.dl-col.dl-col--featured {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid transparent;
  background: transparent;
  box-shadow: 0 8px 28px rgba(50, 130, 230, 0.22), 0 2px 10px rgba(50, 130, 230, 0.14);
}

.download-dialog--light a.dl-col.dl-col--featured::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.download-dialog--light a.dl-col.dl-col--featured:hover {
  border-color: transparent;
  background: transparent;
  box-shadow: 0 10px 34px rgba(50, 130, 230, 0.28), 0 4px 14px rgba(50, 130, 230, 0.16);
  transform: translateY(-1px);
}

.download-dialog--light a.dl-col.dl-col--featured .dl-col__k {
  position: relative;
  z-index: 1;
  color: #111;
  font-weight: 700;
}

.download-dialog--light .dl-col__k {
  width: 100%;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #1a1a1a;
  letter-spacing: 0;
}

.dl-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 6px;
  min-height: 120px;
  padding: 14px 16px 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.15s;
  position: relative;
  box-sizing: border-box;
}

.dl-col:hover {
  border-color: rgba(77, 163, 255, 0.4);
  background: var(--accent-dim);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
}

.dl-col--baidu {
  border-color: rgba(77, 163, 255, 0.45);
  background: linear-gradient(180deg, var(--bg-card) 0%, rgba(77, 163, 255, 0.1) 100%);
  padding-top: 30px;
  box-shadow: inset 0 0 0 1px rgba(77, 163, 255, 0.12);
}

.dl-col--baidu:hover {
  border-color: rgba(77, 163, 255, 0.6);
  background: linear-gradient(180deg, var(--accent-dim) 0%, rgba(77, 163, 255, 0.14) 100%);
  box-shadow: 0 4px 16px rgba(77, 163, 255, 0.15);
}

.dl-col--featured {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid transparent;
  background: none;
  color: #111;
  box-shadow: 0 10px 44px rgba(40, 110, 210, 0.28), 0 4px 18px rgba(40, 110, 210, 0.18);
}

.dl-col--featured::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background-image: linear-gradient(
    90deg,
    #b695ff 0%,
    #90d5ff 34%,
    #baffcc 68%,
    #fff18c 100%
  );
  background-size: 220% 100%;
  background-repeat: no-repeat;
  animation: hero-h1-gradient-shift 12s ease-in-out infinite alternate;
}

.dl-col--featured > * {
  position: relative;
  z-index: 1;
}

.dl-col--featured .dl-col__k,
.dl-col--featured .dl-col__ver,
.dl-col--featured .dl-col__hint {
  color: #111;
}

.dl-col--featured:hover {
  border-color: transparent;
  background: none;
  transform: translateY(-1px);
  box-shadow: 0 12px 52px rgba(50, 130, 230, 0.32), 0 6px 26px rgba(50, 130, 230, 0.2);
}

.dl-col--featured:hover .dl-col__k,
.dl-col--featured:hover .dl-col__ver,
.dl-col--featured:hover .dl-col__hint {
  color: #111;
}

.dl-col__k {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.dl-col__ver {
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
}

.dl-col__hint {
  font-size: 12px;
  line-height: 1.4;
  color: var(--text-dim);
  font-weight: 400;
}

.dl-list__badge {
  position: absolute;
  top: 0;
  left: 0;
  right: auto;
  padding: 4px 12px 4px 14px;
  border-radius: 0 0 10px 0;
  background: linear-gradient(135deg, #4da3ff 0%, #2d7fd9 100%);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}

@media (prefers-reduced-motion: reduce) {
  .dl-col--featured::before {
    animation: none;
    background-size: 100% 100%;
  }
}

@media (max-width: 720px) {
  .dl-cols {
    grid-template-columns: 1fr;
  }
}

/* —— 独立下载页 —— */
.download-page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.download-page__hero {
  position: relative;
  text-align: center;
  padding: 32px 16px 72px;
}

.download-page__hero::before {
  content: "";
  position: absolute;
  inset: -40px 10% 40%;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(77, 163, 255, 0.22), transparent 72%),
    radial-gradient(ellipse 55% 45% at 58% 58%, rgba(139, 92, 246, 0.14), transparent 70%);
  pointer-events: none;
}

.download-page__mark {
  margin: 0 auto 20px;
  width: 120px;
  height: 120px;
  filter: drop-shadow(0 12px 36px rgba(45, 110, 220, 0.35));
}

.download-page__mark .hero__mark-svg {
  width: 120px;
  height: 120px;
}

.download-page__hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4.5vw, 40px);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text);
}

.download-page__hint {
  margin: 0 auto 28px;
  max-width: 420px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-dim);
}

.hero__actions.download-page__actions {
  gap: 28px;
}

.hero__actions.download-page__actions .btn {
  padding: 9px 18px;
  font-size: 14px;
}

/* 下载页主按钮：白底（不参与首页首屏彩虹动画） */
.hero__actions.download-page__actions .btn--primary {
  color: var(--text-dark) !important;
  background: #fff !important;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  transition: background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.hero__actions.download-page__actions .btn--primary::before,
.hero__actions.download-page__actions .btn--primary::after {
  display: none !important;
}

.hero__actions.download-page__actions .btn--primary:hover,
.hero__actions.download-page__actions .btn--primary:focus-visible {
  color: var(--text-dark) !important;
  background: #f3f4f6 !important;
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.14);
}

.download-page__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 32px;
  margin-top: 16px;
}

.download-step {
  text-align: center;
}

.download-step__frame {
  position: relative;
  margin: 0 auto 20px;
  max-width: 320px;
  padding: 18px 14px 22px;
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(77, 163, 255, 0.12), rgba(139, 92, 246, 0.08));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.download-step__frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 12px;
  background: radial-gradient(ellipse 80% 70% at 50% 20%, rgba(77, 163, 255, 0.15), transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.download-step__thumb {
  position: relative;
  z-index: 1;
  margin: 0 auto;
  aspect-ratio: 16 / 11;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.download-step__thumb--mock {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  padding: 14px 12px;
  gap: 8px;
  text-align: left;
}

.download-step__mock-bar {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
}

.download-step__mock-bar--short {
  width: 55%;
}

.download-step__mock-bar--mid {
  width: 72%;
}

.download-step__mock-row {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.download-step__mock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}

.download-step__mock-btn {
  margin-top: auto;
  align-self: center;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
  background: linear-gradient(135deg, rgba(77, 163, 255, 0.35), rgba(139, 92, 246, 0.25));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.download-step__mock-list {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.download-step__mock-item {
  height: 22px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
}

.download-step__mock-input {
  margin-top: 10px;
  height: 36px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.download-step__thumb--edu-ok {
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-step__edu-ok {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 8px 32px rgba(77, 163, 255, 0.25);
}

.download-page__steps.edu-flow-steps {
  margin-top: 20px;
  margin-bottom: 4px;
}

body[data-page="education"] .download-page__steps.edu-flow-steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

body[data-page="download"] .download-page__steps.edu-flow-steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 1180px) {
  body[data-page="education"] .download-page__steps.edu-flow-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  body[data-page="download"] .download-page__steps.edu-flow-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.edu-flow-section .download-step__frame,
.download-page__steps.edu-flow-steps .download-step__frame {
  background: transparent;
  box-shadow: none;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.edu-flow-section .download-step__frame::after,
.download-page__steps.edu-flow-steps .download-step__frame::after {
  display: none;
}

.edu-flow-section .download-step__thumb,
.download-page__steps.edu-flow-steps .download-step__thumb {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow: none;
}

.edu-flow-section .download-step__mock-bar,
.download-page__steps.edu-flow-steps .download-step__mock-bar {
  height: 7px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.32);
}

.edu-flow-section .download-step__mock-dot,
.download-page__steps.edu-flow-steps .download-step__mock-dot {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.48);
}

.edu-flow-section .download-step__mock-btn,
.download-page__steps.edu-flow-steps .download-step__mock-btn {
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.9);
  color: #111;
  text-decoration: none;
  cursor: default;
  transition: opacity 0.2s ease;
}

.edu-flow-section a.download-step__mock-btn:hover,
.download-page__steps.edu-flow-steps a.download-step__mock-btn:hover {
  opacity: 0.88;
}

.edu-flow-section .download-step__mock-item,
.download-page__steps.edu-flow-steps .download-step__mock-item {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.edu-flow-section .download-step__mock-input,
.download-page__steps.edu-flow-steps .download-step__mock-input {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.edu-flow-section .download-step__edu-ok,
.download-page__steps.edu-flow-steps .download-step__edu-ok {
  color: #fff;
  text-shadow: none;
}

.edu-flow-section .download-step__text,
.download-page__steps.edu-flow-steps .download-step__text {
  color: rgba(255, 255, 255, 0.78);
}

.edu-flow-section .download-step__text strong,
.download-page__steps.edu-flow-steps .download-step__text strong {
  color: #fff;
  font-weight: 600;
}

.download-step__num {
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 12px;
  color: #fff;
}

.download-step__text {
  margin: 0 auto;
  max-width: 280px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-dim);
}

@media (max-width: 900px) {
  .download-page__steps {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .download-page__steps.edu-flow-steps {
    grid-template-columns: 1fr;
  }

  .download-step__frame {
    max-width: none;
  }
}

/* —— 更新公告 —— */
.changelog-page {
  padding-top: 20px;
}

.changelog-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 0 32px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 48px;
  align-items: start;
}

.changelog-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: 8px 0 24px;
}

.changelog-sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.changelog-sidebar__link {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
  white-space: normal;
  word-break: break-word;
}

.changelog-sidebar__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.changelog-sidebar__link.is-active {
  color: var(--text);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
}

.changelog-doc {
  background: #fff;
  color: #1f2329;
  border-radius: 8px;
  margin: 0 0 24px;
  padding: 36px 44px 48px;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08);
}

.changelog-doc__title {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 20px;
  line-height: 1.35;
  color: #1f2329;
}

.changelog-doc__body h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: #1f2329;
}

.changelog-doc__body h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 10px;
  color: #1f2329;
}

.changelog-doc__body h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 16px 0 8px;
  color: #1f2329;
}

.changelog-doc__body p {
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 12px;
}

.changelog-doc__body ol {
  margin: 0 0 16px;
  padding-left: 1.5em;
}

.changelog-doc__body ol li {
  font-size: 14px;
  line-height: 1.75;
  margin-bottom: 6px;
}

.changelog-doc__body strong {
  font-weight: 600;
}

.changelog-doc__body a {
  color: #0057ff;
  text-decoration: none;
}

.changelog-doc__body a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .changelog-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 16px 40px;
  }

  .changelog-sidebar {
    position: static;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
  }

  .changelog-doc {
    padding: 24px 18px 32px;
  }

  .changelog-doc__title {
    font-size: 22px;
  }
}

/* —— 移动导航 —— */
@media (max-width: 960px) {
  .nav__toggle {
    display: block;
  }

  #main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 99;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    display: none;
    flex: none;
    min-width: unset;
  }

  body.nav-open #main-nav {
    display: flex;
  }

  #main-nav a {
    padding: 12px 16px;
  }

  #main-nav .nav__item {
    display: flex;
    flex-direction: column;
  }

  #main-nav .nav__submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0 0 4px 8px;
    min-width: 0;
  }

  #main-nav .nav__submenu a {
    font-size: 13px;
    padding: 10px 16px 10px 24px;
  }
}