/* 社媒外贸 · 学院目录风格：白底为主，电光蓝 #0066FF 做强调，黑色只用于推荐位、课程头图、社群条和页脚（2026-10-01） */

:root {
  --brand: #0066FF;
  --brand-hover: #0052CC;
  --brand-soft: #E6F0FF;
  --bg: #FFFFFF;
  --bg-2: #F5F6F8;
  --text: #111111;
  --body: #2B2D31;
  --muted: #5C5F66;
  --line: #E3E5E8;
  --card: #FFFFFF;
  --card-line: #E3E5E8;
  --link: #0066FF;
  --focus: #0066FF;
  --danger: #D92D20;
  --radius-card: 20px;
  --radius-lg: 24px;
  --radius-photo: 16px;
  --radius-input: 8px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1200px;
  --header-h: 68px;
}

.is-dark {
  --bg: #0A0A0A;
  --bg-2: #161616;
  --text: #FFFFFF;
  --body: #E2E2E2;
  --muted: #9A9A9A;
  --line: #2A2A2A;
  --card: #161616;
  --card-line: #262626;
  --link: #4D94FF;
  --focus: #4D94FF;
  color: var(--body);
  background-color: var(--bg);
  background-image: repeating-linear-gradient(90deg, rgba(255, 255, 255, .018) 0 1px, transparent 1px 4px);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.75; color: var(--body); background: var(--bg); }
img, svg, video { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: .2em; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--text); line-height: 1.3; margin: 0; }
p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
mark { background: var(--brand-soft); color: var(--text); padding: 0 .1em; border-radius: 3px; }
.is-dark mark { background: rgba(0, 102, 255, .35); color: #FFFFFF; }
.icon { width: 1.1em; height: 1.1em; flex-shrink: 0; vertical-align: -0.15em; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 16px; top: -60px; z-index: 100; padding: 10px 16px; border-radius: 999px; background: var(--brand); color: #FFFFFF; font-weight: 700; }
.skip-link:focus { top: 12px; }

.wrap { width: min(var(--wrap), calc(100% - 32px)); margin-inline: auto; }
.narrow { width: min(760px, calc(100% - 32px)); margin-inline: auto; }
.section { padding-block: 80px; }
.section--tight { padding-block: 48px 72px; }
.section--alt { background: var(--bg-2); }
.spacer { height: 56px; }
.center-link { margin-top: 32px; text-align: center; }

/* 眉题、分隔、标题 */
.eyebrow { margin: 0 0 12px; font-size: 13px; font-weight: 600; letter-spacing: .08em; color: var(--link); }
.divider { display: block; width: 136px; height: 8px; margin: 20px 0; background:
  linear-gradient(var(--line), var(--line)) left center / 56px 1px no-repeat,
  linear-gradient(var(--line), var(--line)) right center / 56px 1px no-repeat,
  radial-gradient(circle, var(--brand) 3.5px, transparent 4px) center / 8px 8px no-repeat; }
.is-dark .divider { background:
  linear-gradient(#555555, #555555) left center / 56px 1px no-repeat,
  linear-gradient(#555555, #555555) right center / 56px 1px no-repeat,
  radial-gradient(circle, var(--brand) 3.5px, transparent 4px) center / 8px 8px no-repeat; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 32px; }
.section-head__title { font-size: 32px; font-weight: 800; letter-spacing: -.01em; }
.section-head__desc { margin-top: 10px; max-width: 620px; color: var(--muted); }
.section-head__more { display: inline-flex; align-items: center; gap: 6px; flex-shrink: 0; font-weight: 600; text-decoration: none; }
.section-head--center { justify-content: center; text-align: center; }
.section-head--center .divider { margin-inline: auto; }
.section-head--center .section-head__desc { margin-inline: auto; }
.page-title { font-size: 44px; font-weight: 800; letter-spacing: -.01em; margin-top: 8px; }
.block-title { margin: 40px 0 16px; font-size: 22px; font-weight: 700; }
.block-title:first-child { margin-top: 0; }
.lede { margin-top: 16px; font-size: 19px; color: var(--muted); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; font-size: 14px; color: var(--muted); }
.breadcrumb a { color: inherit; }
.text-link { font-weight: 600; }

/* 按钮与标签 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 24px; border: 1.5px solid transparent; border-radius: 999px; font-size: 16px; font-weight: 700; line-height: 1; text-decoration: none; cursor: pointer; transition: background-color .15s, border-color .15s, color .15s; white-space: nowrap; }
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--brand); color: #FFFFFF; }
.btn--primary:hover { background: var(--brand-hover); color: #FFFFFF; }
.btn--ghost { background: transparent; border-color: currentColor; color: var(--text); }
.btn--ghost:hover { border-color: var(--link); color: var(--link); }
.btn--lg { min-height: 56px; padding: 0 30px; font-size: 17px; }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn--block { width: 100%; }
.btn.is-disabled { background: var(--bg-2); color: var(--muted); border-color: var(--line); cursor: not-allowed; }
.btn:disabled { opacity: .6; cursor: wait; }
.text-button { display: inline-flex; align-items: center; gap: 6px; padding: 8px 4px; border: 0; background: none; color: var(--muted); font-size: 14px; cursor: pointer; }
.text-button:hover { color: var(--link); }

.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; line-height: 1.6; text-decoration: none; white-space: nowrap; }
.badge .icon { width: 12px; height: 12px; }
.badge--free, .badge--trial { background: var(--brand-soft); color: #0047B3; }
.badge--paid { background: var(--text); color: var(--bg); }
.badge--plain { background: var(--bg-2); color: var(--muted); }
.badge--lock { background: var(--bg-2); color: var(--muted); }
.badge--ad { background: #FFF4E5; color: #8A4B00; }
.badge--state { background: #E7F6EC; color: #1B6B35; }
.is-dark .badge--plain, .is-dark .badge--lock { background: #262626; color: #C8C8C8; }
.is-dark .badge--free, .is-dark .badge--trial { background: rgba(0, 102, 255, .22); color: #9CC2FF; }
.is-dark .badge--paid { background: #FFFFFF; color: #0A0A0A; }

/* 顶部栏（白底） */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); border-bottom: 1px solid #E3E5E8; backdrop-filter: saturate(1.4) blur(12px); }
.site-header__inner { display: flex; align-items: center; gap: 28px; min-height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #111111; text-decoration: none; }
.site-footer .brand { color: #FFFFFF; }
.brand:hover { text-decoration: none; }
.brand__mark { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: var(--brand); color: #FFFFFF; transform: rotate(-45deg); }
.brand__mark .icon { transform: rotate(45deg); width: 18px; height: 18px; }
.brand__name { font-size: 20px; font-weight: 900; letter-spacing: .02em; }
.brand--company { flex-shrink: 0; max-width: 270px; }
.brand--company .brand__mark { flex-shrink: 0; }
.brand--company .brand__name { max-width: 216px; font-size: 16px; font-weight: 700; line-height: 1.5; letter-spacing: 0; text-wrap: balance; }
.site-nav { display: flex; gap: 2px; }
.site-nav a { padding: 8px 12px; border-radius: 999px; color: #2B2D31; font-size: 15px; font-weight: 500; text-decoration: none; }
.site-nav a:hover { color: #111111; background: #F5F6F8; }
.site-nav a[aria-current="page"] { color: #111111; font-weight: 700; box-shadow: inset 0 -2px 0 var(--brand); border-radius: 0; }
.site-header__actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.header-link { color: #2B2D31; font-size: 14px; text-decoration: none; white-space: nowrap; }
.header-link:hover, .header-link[aria-current="page"] { color: var(--brand); }
.header-search { display: flex; align-items: center; height: 40px; padding: 0 4px 0 14px; border: 1px solid #D5D8DD; border-radius: 999px; background: #FFFFFF; }
.header-search input { width: 150px; border: 0; background: transparent; color: #111111; font-size: 14px; outline: none; }
.header-search input::placeholder, .mobile-search input::placeholder { color: #8A8D93; }
.header-search button, .mobile-search button { display: grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 999px; background: transparent; color: #5C5F66; cursor: pointer; }
.header-search:focus-within, .mobile-search:focus-within { border-color: var(--brand); }
.mobile-menu { display: none; position: relative; }
.mobile-menu summary { display: grid; place-items: center; width: 44px; height: 44px; list-style: none; color: #111111; cursor: pointer; }
.mobile-menu summary::-webkit-details-marker { display: none; }
.mobile-menu__panel { position: absolute; right: 0; top: calc(100% + 8px); width: min(320px, calc(100vw - 32px)); padding: 16px; border: 1px solid #E3E5E8; border-radius: var(--radius-card); background: #FFFFFF; box-shadow: 0 16px 40px rgba(0, 0, 0, .12); }
.mobile-menu__panel nav { display: grid; margin: 8px 0 0; }
.mobile-menu__panel nav a { padding: 12px 8px; border-bottom: 1px solid #EEF0F2; color: #2B2D31; font-size: 16px; text-decoration: none; }
.mobile-menu__panel nav a:last-child { border-bottom: 0; }
.mobile-menu__panel nav a[aria-current="page"] { color: var(--brand); font-weight: 700; }
.mobile-search { display: flex; align-items: center; height: 44px; padding: 0 4px 0 14px; border: 1px solid #D5D8DD; border-radius: 999px; background: #FFFFFF; }
.mobile-search input { flex: 1; min-width: 0; border: 0; background: transparent; color: #111111; outline: none; }

/* 首屏与页头 */
.hero { padding-block: 104px 96px; text-align: center; }
.hero--compact { padding-block: 80px 72px; }
.hero__inner { display: flex; flex-direction: column; align-items: center; }
.hero__title { font-size: 64px; font-weight: 900; line-height: 1.18; letter-spacing: -.01em; color: #FFFFFF; }
.hero .divider { margin: 28px auto; }
.hero__sub { max-width: 640px; font-size: 18px; line-height: 1.9; color: #E2E2E2; }
.hero__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 36px; }
.hero__pillars { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; width: 100%; max-width: 880px; margin: 56px 0 0; padding: 0; list-style: none; }
.hero__pillars li { display: flex; flex-direction: column; gap: 2px; padding: 16px; border: 1px solid #262626; border-radius: var(--radius-card); background: rgba(22, 22, 22, .8); }
.hero__pillars strong { color: #FFFFFF; font-size: 16px; }
.hero__pillars span { color: #9A9A9A; font-size: 14px; }
.price-tag { margin-top: 20px; font-size: 22px; font-weight: 800; color: #FFFFFF; }
.page-hero { padding-block: 48px 40px; background: #F5F6F8; border-bottom: 1px solid #E3E5E8; }
.page-hero__title { font-size: 36px; font-weight: 900; color: #111111; }
.page-hero__desc { max-width: 680px; margin-top: 10px; font-size: 16px; color: #5C5F66; }
.page-hero .big-search input { border-color: #D5D8DD; background: #FFFFFF; color: #111111; }
.big-search { display: flex; gap: 10px; width: 100%; max-width: 640px; margin-top: 28px; }
.big-search input { flex: 1; min-width: 0; height: 52px; padding: 0 20px; border: 1px solid #333333; border-radius: 999px; background: #121212; color: #FFFFFF; font-size: 16px; }
.big-search input:focus { outline: none; border-color: var(--link); }
.hero .big-search { margin-inline: auto; }

/* 栅格与卡片 */
.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { position: relative; display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid var(--card-line); border-radius: var(--radius-card); background: var(--card); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--link); }
.card__media { aspect-ratio: 16 / 9; overflow: hidden; background: #0A0A0A; }
.card__media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.card__body { display: flex; flex: 1; flex-direction: column; gap: 10px; padding: 20px; }
.card__badges { display: flex; flex-wrap: wrap; gap: 6px; }
.card__eyebrow { font-size: 13px; font-weight: 600; color: var(--link); }
.card__title { font-size: 19px; font-weight: 700; line-height: 1.45; }
.card__link { color: var(--text); text-decoration: none; }
.card__link::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.card__link:hover { text-decoration: none; }
.card__desc { color: var(--muted); font-size: 15px; line-height: 1.7; }
.card__meta { margin-top: auto; color: var(--muted); font-size: 13px; }
.card__cta { display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; color: var(--link); font-size: 14px; font-weight: 700; }
.card__foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 8px; }
.card__action { position: relative; z-index: 2; }
.cover-fallback { display: grid; place-items: center; width: 100%; height: 100%; padding: 20px; background: #0A0A0A repeating-linear-gradient(90deg, rgba(255, 255, 255, .03) 0 1px, transparent 1px 4px); color: #FFFFFF; font-size: 22px; font-weight: 900; line-height: 1.35; text-align: center; }
.cover-fallback span { position: relative; padding-bottom: 18px; }
.cover-fallback span::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 8px; height: 8px; margin-left: -4px; border-radius: 50%; background: var(--brand); }

/* Skill 产品卡：用统一的封装感代替普通文章卡片 */
.card--skill { min-height: 390px; border-color: #DDE5F0; border-radius: 20px; background: linear-gradient(180deg, #FFFFFF 0%, #FBFDFF 100%); box-shadow: 0 12px 32px rgba(18, 38, 63, .06); transition: border-color .2s, box-shadow .2s, transform .2s; }
.card--skill:hover { border-color: rgba(0, 102, 255, .42); box-shadow: 0 22px 48px rgba(0, 102, 255, .13); transform: translateY(-4px); }
.skill-card__visual { position: relative; display: flex; align-items: center; justify-content: space-between; min-height: 116px; padding: 24px; overflow: hidden; background: linear-gradient(135deg, #071426 0%, #0B2142 62%, #0A2C60 100%); color: #FFFFFF; }
.skill-card__visual::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px); background-size: 24px 24px; mask-image: linear-gradient(90deg, #000, transparent 82%); }
.skill-card__visual::after { content: ""; position: absolute; right: -36px; bottom: -62px; width: 170px; height: 170px; border-radius: 50%; background: rgba(0, 102, 255, .42); filter: blur(8px); }
.skill-card__icon { position: relative; z-index: 1; display: grid; place-items: center; width: 62px; height: 62px; border: 1px solid rgba(255, 255, 255, .24); border-radius: 17px; background: linear-gradient(145deg, rgba(0, 102, 255, .92), rgba(0, 153, 255, .58)); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .22), 0 12px 26px rgba(0, 89, 230, .32); }
.skill-card__icon .icon { width: 31px; height: 31px; stroke-width: 1.8; }
.skill-card__version { position: relative; z-index: 1; align-self: flex-start; padding: 6px 10px; border: 1px solid rgba(255, 255, 255, .18); border-radius: 999px; background: rgba(3, 13, 29, .42); color: #CFE2FF; font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .02em; backdrop-filter: blur(8px); }
.skill-card__body { gap: 12px; padding: 24px; }
.skill-card__kind { color: #0066FF; font-size: 12px; font-weight: 800; letter-spacing: .11em; }
.skill-card__kind span { color: #9EBBE4; }
.card--skill .card__title { font-size: 21px; font-weight: 850; letter-spacing: -.01em; line-height: 1.4; }
.card--skill .card__desc { display: -webkit-box; min-height: 76px; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.skill-card__footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-top: auto; padding-top: 16px; border-top: 1px solid #E8EDF4; }
.skill-card__footer .card__meta { max-width: 64%; margin-top: 0; }
.skill-card__footer .card__cta { flex-shrink: 0; margin-top: 0; }
.skill-card__footer .card__cta .icon { width: 17px; height: 17px; }

.scenario { position: relative; display: flex; flex-direction: column; gap: 8px; min-height: 196px; padding: 24px; border: 1px solid var(--card-line); border-radius: var(--radius-card); background: var(--card); color: var(--body); text-decoration: none; transition: border-color .15s; }
.scenario:hover { border-color: var(--link); text-decoration: none; }
.scenario__no { color: var(--link); font-size: 14px; font-weight: 700; }
.scenario__title { color: var(--text); font-size: 20px; font-weight: 800; }
.scenario__desc { color: var(--muted); font-size: 15px; }
.scenario__go { margin-top: auto; color: var(--link); }

.tabs__list { display: flex; gap: 8px; margin-bottom: 24px; }
.tabs__list [role="tab"] { min-height: 40px; padding: 0 18px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--muted); font-weight: 600; cursor: pointer; }
.tabs__list [role="tab"][aria-selected="true"] { border-color: var(--text); background: var(--text); color: var(--bg); }
.tabs__list--sticky { position: sticky; top: var(--header-h); z-index: 5; margin-inline: -8px; padding: 12px 8px; background: var(--bg); }
.js .tabs__panel[hidden] { display: none; }
.tabs__panel + .tabs__panel { margin-top: 48px; }
.js .tabs__panel + .tabs__panel { margin-top: 0; }

/* 资源对接 */
/* 资源卡片：品牌蓝描边，强调可直接办理 */
.card--resource { border: 1.5px solid var(--brand); }
.card--resource:hover { border-color: var(--brand-hover); box-shadow: 0 8px 24px rgba(0, 102, 255, .12); }
/* 按钮文字较长（如“立即申请 Facebook 广告开户”）时换到下一行，不撑出卡片 */
.card--resource .card__foot { flex-wrap: wrap; }
.card--resource .card__action { margin-left: auto; }
.disclosure { margin-bottom: 28px; padding: 12px 16px; border-radius: var(--radius-input); background: #FFF8EC; color: #6B4A12; font-size: 14px; }
.resource-head { display: flex; align-items: center; gap: 14px; }
.resource-logo { display: flex; flex-shrink: 0; align-items: center; justify-content: center; width: 56px; height: 56px; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #FFFFFF; color: var(--brand); font-size: 22px; font-weight: 900; }
/* 固定尺寸的框：否则 WordPress 给懒加载图片的 contain-intrinsic-size(3000px) 会把图片撑大 */
.resource-logo img { width: 100%; height: 100%; object-fit: contain; contain-intrinsic-size: none; }
.resource-logo--lg { width: 88px; height: 88px; border-radius: 20px; font-size: 34px; }
.resource-perk { padding: 10px 12px; border-radius: var(--radius-input); background: var(--brand-soft); color: #0047B3; font-size: 14px; }
.resource-perk--lg { display: flex; flex-direction: column; gap: 4px; margin: 24px 0; font-size: 16px; }
.resource-hero { display: flex; align-items: center; gap: 24px; margin-bottom: 8px; }
.resource-hero .badge { margin-top: 12px; }
.consult-card { display: flex; align-items: center; gap: 20px; margin-top: 48px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--card); }
.consult-card__qr { width: 104px; height: 104px; border-radius: 12px; }
.consult-card__title { font-size: 18px; font-weight: 800; color: var(--text); }
.consult-card__desc { margin: 6px 0 12px; color: var(--muted); }

/* 社群与讲师 */
.community-band__inner { display: grid; grid-template-columns: 1.4fr 1fr; align-items: center; gap: 48px; }
.community-band__title { font-size: 36px; font-weight: 900; color: #FFFFFF; }
.community-band__tagline { margin-top: 12px; font-size: 18px; color: #E2E2E2; }
.community-band__cta { display: flex; justify-content: flex-end; }
.check-list { display: grid; gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; }
.check-list .icon { margin-top: .3em; color: var(--brand); }
.is-dark .check-list .icon { color: var(--link); }
.check-list strong { color: var(--text); }
.plain-list { margin: 0; padding-left: 1.2em; }
.plain-list li + li, .outline-list li + li { margin-top: 6px; }
.outline-list { margin: 0; padding-left: 1.4em; }
.benefit { padding: 28px; border: 1px solid var(--card-line); border-radius: var(--radius-card); background: var(--card); }
.benefit__no { color: var(--link); font-size: 14px; font-weight: 700; }
.benefit__title { margin-top: 10px; font-size: 20px; font-weight: 800; }
.benefit__desc { margin-top: 8px; color: var(--muted); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 18px 0; color: var(--text); font-weight: 700; cursor: pointer; }
.faq details p { padding-bottom: 18px; color: var(--muted); }

.teacher { max-width: 920px; margin-inline: auto; }
.teacher-card { display: grid; grid-template-columns: 1fr 300px; align-items: center; gap: 32px; padding: 40px 48px; border-radius: var(--radius-lg); background: var(--brand); color: #FFFFFF; }
.teacher-card__label { font-size: 15px; font-weight: 700; letter-spacing: .1em; color: #D6E6FF; }
.teacher-card__name { margin: 6px 0 18px; font-size: 52px; font-weight: 900; line-height: 1.1; color: #FFFFFF; }
.teacher-card ul { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; font-size: 18px; }
.teacher-card li::before { content: "·"; margin-right: 12px; font-weight: 900; }
.teacher-card__photo { aspect-ratio: 1 / 1; overflow: hidden; border-radius: var(--radius-photo); background: #A3A1A3; }
.teacher-card__photo img { display: block; width: 100%; height: 100%; object-fit: cover; }
.teacher-card__placeholder { display: grid; place-items: center; width: 100%; height: 100%; color: #FFFFFF; font-size: 96px; font-weight: 900; }
.quote { margin: 48px 0 0; padding: 4px 0 4px 28px; border-left: 3px solid var(--brand); }
.quote p { font-size: 22px; line-height: 1.7; color: #E2E2E2; }

/* 课程详情 */
.course-hero { padding-block: 56px; }
.course-hero__inner { display: grid; grid-template-columns: 1.3fr 1fr; align-items: center; gap: 48px; }
.course-hero .breadcrumb { color: #9A9A9A; }
.course-hero__title { margin-top: 16px; font-size: 44px; font-weight: 900; color: #FFFFFF; }
.course-hero__tagline { margin-top: 14px; font-size: 18px; color: #E2E2E2; }
.course-hero__meta { margin-top: 14px; color: #9A9A9A; font-size: 15px; }
.course-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.course-hero__cover { aspect-ratio: 16 / 9; overflow: hidden; border: 1px solid #262626; border-radius: var(--radius-card); }
.course-hero__cover img { display: block; width: 100%; height: 100%; object-fit: cover; }
.course-layout { max-width: 860px; }
.lesson-toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; color: var(--muted); font-size: 14px; }
.lesson-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.lesson { display: flex; align-items: center; gap: 16px; padding: 16px 4px; border-bottom: 1px solid var(--line); }
.lesson__no { width: 28px; flex-shrink: 0; color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.lesson__title { flex: 1; min-width: 0; color: var(--text); font-weight: 600; text-decoration: none; }
a.lesson__title:hover { color: var(--link); }
.lesson__side { display: flex; flex-shrink: 0; align-items: center; gap: 8px; }
.lesson__duration { color: var(--muted); font-size: 13px; }
.lesson.is-locked .lesson__title { color: var(--muted); font-weight: 500; }
.lesson.is-done .lesson__title { color: var(--muted); }
.lesson.is-current { background: var(--brand-soft); }

/* 阅读页 */
.reading-progress { position: fixed; top: 0; left: 0; right: 0; z-index: 60; height: 3px; pointer-events: none; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--brand); }
.reader { padding-block: 40px 80px; }
.reader__layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 56px; align-items: start; }
.reader__layout:not(:has(.reader__toc)) { grid-template-columns: minmax(0, 1fr); }
.reader__main { max-width: 720px; }
.reader__toc { position: sticky; top: calc(var(--header-h) + 24px); max-height: calc(100vh - var(--header-h) - 48px); overflow: auto; }
.toc summary { display: flex; gap: 8px; align-items: center; padding-bottom: 12px; color: var(--text); font-weight: 700; cursor: pointer; }
.toc ol { margin: 0; padding: 0; list-style: none; }
.toc__item a, .toc__locked { display: flex; gap: 10px; padding: 8px 10px; border-radius: 10px; color: var(--body); font-size: 14px; text-decoration: none; }
.toc__item a span, .toc__locked span { color: var(--muted); font-variant-numeric: tabular-nums; }
.toc__item a:hover { background: var(--bg-2); }
.toc__item.is-current a { background: var(--brand-soft); color: #0047B3; font-weight: 700; }
.toc__item.is-done a { color: var(--muted); }
.toc__locked { color: var(--muted); }
.toc__locked .icon { margin-left: auto; width: 14px; }
.reader__title { font-size: 36px; font-weight: 800; }
.reader__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; color: var(--muted); font-size: 14px; }
.reader__tools { display: flex; align-items: center; gap: 6px; margin-top: 20px; }
.reader__tools-label { margin-right: 4px; color: var(--muted); font-size: 13px; }
.reader__tools button { min-width: 40px; height: 32px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--muted); font-size: 13px; cursor: pointer; }
.reader__tools button[aria-pressed="true"] { border-color: var(--text); color: var(--text); font-weight: 700; }
.lesson-brief { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 28px 0; padding: 20px 24px; border-radius: var(--radius-card); background: var(--bg-2); }
.lesson-brief ul { margin: 8px 0 0; padding-left: 1.2em; color: var(--muted); }
.lesson-faq { margin-top: 48px; }
.lesson-faq h2 { font-size: 22px; margin-bottom: 12px; }
.lesson-done { margin-top: 48px; text-align: center; }
.lesson-done .is-done { border-color: #1B6B35; color: #1B6B35; }
.upsell { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 40px; padding: 28px; border-radius: var(--radius-card); }
.upsell__title { color: #FFFFFF; font-size: 20px; font-weight: 800; }
.upsell__desc { margin-top: 6px; color: #9A9A9A; }
.lesson-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; }
.lesson-nav__item { display: flex; flex-direction: column; gap: 4px; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius-card); color: var(--text); text-decoration: none; }
.lesson-nav__item span { color: var(--muted); font-size: 13px; }
.lesson-nav__item--next { text-align: right; }
a.lesson-nav__item:hover { border-color: var(--link); text-decoration: none; }
.lesson-nav__item.is-locked strong { color: var(--muted); }

.prose { color: var(--body); font-size: 17px; line-height: 1.9; overflow-wrap: anywhere; }
.prose.is-font-s { font-size: 15px; }
.prose.is-font-l { font-size: 20px; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; font-size: 1.45em; }
.prose h3 { margin-top: 1.6em; font-size: 1.2em; }
.prose img { border-radius: var(--radius-photo); }
.prose blockquote { margin-inline: 0; padding-left: 20px; border-left: 3px solid var(--brand); color: var(--text); }
.prose pre { padding: 16px; overflow: auto; border-radius: 12px; background: #0A0A0A; color: #E2E2E2; font-size: 14px; }
.prose table { display: block; overflow-x: auto; border-collapse: collapse; }
.prose th, .prose td { padding: 8px 12px; border: 1px solid var(--line); }
.prose .has-background, .prose mark.highlight { border-radius: 12px; }
.article-cover { margin: 28px 0; }
.article-cover img { display: block; width: 100%; border-radius: var(--radius-photo); }
.video-shell { display: grid; place-items: center; aspect-ratio: 16 / 9; margin: 28px 0; overflow: hidden; border-radius: var(--radius-card); background: #0A0A0A; }
.video-shell iframe { width: 100%; height: 100%; border: 0; }
.video-consent { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; border: 1px solid #444444; border-radius: 999px; background: transparent; color: #FFFFFF; font-weight: 700; cursor: pointer; }
.mini-cta { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 56px; padding: 24px; border-radius: var(--radius-card); background: var(--brand-soft); }
.mini-cta__title { color: var(--text); font-size: 18px; font-weight: 800; }
.mini-cta__desc { margin-top: 4px; color: var(--muted); }

/* Skill 与问卷 */
.skill-hero { display: grid; grid-template-columns: 1.3fr 1fr; align-items: start; gap: 48px; }
.skill-product-label { display: inline-flex; align-items: center; gap: 12px; margin: 18px 0 20px; padding: 9px 14px 9px 9px; border: 1px solid #DCE7F6; border-radius: 15px; background: #F7FAFF; }
.skill-product-label__icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: var(--brand); color: #FFFFFF; box-shadow: 0 8px 18px rgba(0, 102, 255, .2); }
.skill-product-label__icon .icon { width: 22px; height: 22px; }
.skill-product-label > span:last-child { display: flex; flex-direction: column; gap: 1px; }
.skill-product-label small { color: #0066FF; font-size: 10px; font-weight: 800; letter-spacing: .13em; }
.skill-product-label strong { color: #233044; font-size: 13px; }
.skill-hero__text .card__badges { margin: 20px 0 28px; }
.spec-card { display: grid; margin: 40px 0 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); }
.spec-card div { display: flex; justify-content: space-between; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.spec-card div:last-child { border-bottom: 0; }
.spec-card dt { color: var(--muted); }
.spec-card dd { margin: 0; color: var(--text); text-align: right; overflow-wrap: anywhere; }
.spec-card code { font-size: 12px; }
.info-block { margin-top: 36px; }
.info-block h2 { margin-bottom: 12px; font-size: 22px; }
.info-block--notice { padding: 20px 24px; border-radius: var(--radius-card); background: #FFF8EC; }
.info-block--notice .prose + .disclaimer { margin-top: 12px; }
.disclaimer { color: #5C5F66; font-size: 14px; line-height: 1.8; }
.disclaimer strong { color: #2B2D31; }
.download-panel { padding: 40px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--card); }
.download-panel__title { font-size: 28px; font-weight: 800; }
.download-panel__desc { margin: 10px 0 28px; color: var(--muted); }
.steps { display: flex; gap: 8px; margin: 0 0 24px; padding: 0; list-style: none; counter-reset: step; }
.steps li { flex: 1; padding-top: 10px; border-top: 3px solid var(--line); color: var(--muted); font-size: 14px; counter-increment: step; }
.steps li::before { content: counter(step) " · "; }
.steps li.is-current, .steps li.is-done { border-color: var(--brand); color: var(--text); font-weight: 700; }
.step { margin: 0; padding: 0; border: 0; }
.step legend { margin-bottom: 20px; color: var(--text); font-size: 20px; font-weight: 800; }
.js .lead-form .step:not(.is-active) { display: none; }
.lead-form:not(.is-stepped) .step + .step { margin-top: 36px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 20px; }
.lead-form label { display: flex; flex-direction: column; gap: 6px; color: var(--text); font-size: 15px; font-weight: 600; }
.lead-form input:not([type="checkbox"]):not([type="radio"]), .lead-form select, .lead-form textarea { width: 100%; min-height: 48px; padding: 10px 14px; border: 1px solid #C9CCD1; border-radius: var(--radius-input); background: #FFFFFF; color: var(--text); font-size: 16px; font-weight: 400; }
.lead-form textarea { min-height: 96px; resize: vertical; }
.lead-form input:focus, .lead-form select:focus, .lead-form textarea:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.lead-form [aria-invalid="true"] { border-color: var(--danger) !important; }
.lead-form > .form-grid + label, .lead-form .step > label { margin-top: 16px; }
.field { margin-top: 20px; }
.field__label { display: block; margin-bottom: 10px; color: var(--text); font-size: 15px; font-weight: 600; }
.field.is-invalid .field__label { color: var(--danger); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.lead-form .chip { position: relative; flex-direction: row; align-items: center; gap: 8px; min-height: 44px; padding: 0 16px; border: 1px solid #C9CCD1; border-radius: 999px; background: #FFFFFF; font-size: 15px; font-weight: 500; cursor: pointer; }
.chip input { width: 16px; height: 16px; margin: 0; accent-color: var(--brand); }
.chip:has(input:checked) { border-color: var(--brand); background: var(--brand-soft); color: #0047B3; }
.chip:has(input:focus-visible) { outline: 2px solid var(--brand); outline-offset: 2px; }
.lead-form .consent { flex-direction: row; align-items: flex-start; gap: 10px; margin-top: 20px; color: var(--muted); font-size: 14px; font-weight: 400; }
.consent input { margin-top: 5px; accent-color: var(--brand); }
.form-hint { margin-top: 10px; color: var(--muted); font-size: 14px; }
.step-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 28px; }
.form-status { margin-top: 16px; color: var(--link); font-weight: 600; }
.form-status.is-error { color: var(--danger); }
.honeypot { position: absolute !important; left: -10000px !important; opacity: 0 !important; }

/* 列表、筛选、搜索 */
.filters { display: grid; gap: 12px; margin-bottom: 20px; }
.filters__row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 8px; }
.filters__label { width: 44px; color: var(--muted); font-size: 14px; }
.filter-chip { display: inline-flex; align-items: center; min-height: 36px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--body); font-size: 14px; text-decoration: none; }
.filter-chip:hover { border-color: var(--link); color: var(--link); text-decoration: none; }
.filter-chip[aria-current="true"],
.filter-chip[aria-pressed="true"] { border-color: var(--text); background: var(--text); color: var(--bg); }
button.filter-chip { font-family: inherit; cursor: pointer; }
[data-resource-filter] .filters__row { margin-bottom: 20px; }
.results-bar { display: flex; justify-content: space-between; margin-bottom: 20px; color: var(--muted); font-size: 14px; }
.empty-state { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 56px 24px; border: 1px dashed var(--line); border-radius: var(--radius-card); color: var(--muted); text-align: center; }
.pagination { margin-top: 40px; }
.pagination .nav-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.pagination .page-numbers { display: inline-grid; place-items: center; min-width: 40px; height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--body); text-decoration: none; }
.pagination .page-numbers.current { border-color: var(--text); background: var(--text); color: var(--bg); }
.search-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.search-tabs a { display: inline-flex; gap: 6px; align-items: center; min-height: 36px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; color: var(--body); font-size: 14px; text-decoration: none; }
.search-tabs a span { color: var(--muted); }
.search-tabs a[aria-current="true"] { border-color: var(--text); background: var(--text); color: var(--bg); }
.search-tabs a[aria-current="true"] span { color: inherit; }
.search-results { margin: 0; padding: 0; list-style: none; }
.search-result { padding: 20px 0; border-bottom: 1px solid var(--line); }
.search-result__title { margin-top: 8px; font-size: 20px; }
.search-result__title a { color: var(--text); text-decoration: none; }
.search-result__snippet { margin-top: 6px; color: var(--muted); }

/* 注册、登录与会员资料 */
.auth-section { min-height: 70vh; background: var(--bg-2); }
.auth-wrap { width: min(520px, calc(100% - 32px)); margin-inline: auto; }
.auth-wrap--wide { width: min(820px, calc(100% - 32px)); }
.auth-card { padding: 36px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #FFFFFF; box-shadow: 0 16px 48px rgba(17, 17, 17, .06); }
.auth-card > h1, .account-head h1 { font-size: 32px; font-weight: 900; }
.auth-card__desc, .account-head p { margin-top: 10px; color: var(--muted); }
.auth-card__switch { margin-top: 24px; color: var(--muted); text-align: center; }
.member-form { display: grid; gap: 22px; margin-top: 28px; }
.member-form fieldset { margin: 0; padding: 0; border: 0; }
.member-form legend { margin-bottom: 10px; color: var(--text); font-weight: 700; }
.member-form label { display: flex; flex-direction: column; gap: 6px; color: var(--text); font-size: 15px; font-weight: 600; }
.member-form label small { color: var(--muted); font-size: 12px; font-weight: 400; }
.member-form input:not([type="checkbox"]):not([type="radio"]), .member-form select { width: 100%; min-height: 48px; padding: 10px 14px; border: 1px solid #C9CCD1; border-radius: var(--radius-input); background: #FFFFFF; font-size: 16px; font-weight: 400; }
.member-form input:focus, .member-form select:focus { outline: 0; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.member-form input:disabled { background: var(--bg-2); color: var(--muted); }
.identity-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.identity-grid label { position: relative; cursor: pointer; }
.identity-grid input { position: absolute; opacity: 0; }
.identity-grid span { display: flex; min-height: 92px; flex-direction: column; justify-content: center; gap: 4px; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: #FFFFFF; }
.identity-grid strong { color: var(--text); font-size: 16px; }
.identity-grid input:checked + span { border-color: var(--brand); background: var(--brand-soft); box-shadow: inset 0 0 0 1px var(--brand); }
.identity-grid input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: 2px; }
.sms-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 12px; }
.sms-row .btn { min-width: 138px; }
.member-form .consent { flex-direction: row; align-items: flex-start; gap: 10px; color: var(--muted); font-size: 14px; font-weight: 400; }
.member-form .consent input { margin-top: 5px; accent-color: var(--brand); }
.member-lock { display: grid; justify-items: center; margin-top: 36px; padding: 48px 32px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--bg-2); text-align: center; }
.member-lock__icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); }
.member-lock__icon .icon { width: 26px; height: 26px; }
.member-lock h2 { margin-top: 18px; font-size: 26px; }
.member-lock p { max-width: 520px; margin-top: 10px; color: var(--muted); }
.member-lock__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 24px; }
.account-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 28px; }
.account-head__actions { display: flex; align-items: center; gap: 16px; }
.auth-benefits { display: grid; gap: 8px; margin: 20px 0 0; padding: 16px 18px; border-radius: 14px; background: var(--brand-soft); list-style: none; }
.auth-benefits li { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }
.auth-benefits .icon { width: 16px; height: 16px; flex-shrink: 0; color: var(--brand); }
.account-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; }
.resource-head--lock { margin: 8px 0 4px; }
.resource-head--lock .page-title { margin: 0; }
.resource-lock__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 24px; }
.danger-zone { margin-top: 28px; padding: 24px; border: 1px solid #F0B9B5; border-radius: var(--radius-card); }
.danger-zone h2 { font-size: 18px; }
.danger-zone p { margin: 6px 0 12px; color: var(--muted); }
.text-button--danger { color: var(--danger); }

/* 页脚 */
.site-footer { padding-block: 56px 32px; border-top: 1px solid #1F1F1F; }
.site-footer__top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.site-footer__brand p { margin-top: 16px; color: #9A9A9A; font-size: 14px; line-height: 1.9; }
.site-footer__col { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.site-footer__col strong { color: #FFFFFF; }
.site-footer__col a { color: #C8C8C8; text-decoration: none; }
.site-footer__col a:hover { color: #FFFFFF; }
.site-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 48px; padding-top: 24px; border-top: 1px solid #1F1F1F; color: #8A8A8A; font-size: 13px; }
.filings { display: flex; gap: 16px; }
.filings a { color: #8A8A8A; }

/* 扫码弹窗、回顶部、手机底栏 */
.jump-dialog { width: min(400px, calc(100vw - 32px)); padding: 32px; border: 0; border-radius: var(--radius-lg); background: #FFFFFF; color: var(--body); text-align: center; box-shadow: 0 24px 64px rgba(0, 0, 0, .35); }
.jump-dialog::backdrop { background: rgba(0, 0, 0, .6); }
.jump-dialog__close-form { position: absolute; top: 12px; right: 12px; }
.jump-dialog__close { display: grid; place-items: center; width: 40px; height: 40px; border: 0; border-radius: 999px; background: var(--bg-2); cursor: pointer; }
.jump-dialog__title { font-size: 20px; font-weight: 800; }
.jump-dialog__qr { display: block; width: 200px; height: 200px; margin: 20px auto 0; border-radius: 12px; object-fit: contain; }
.jump-dialog__note { margin-top: 16px; color: var(--muted); font-size: 14px; }
.jump-dialog__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 20px; }
.jump-dialog__status { min-height: 1.5em; margin-top: 10px; color: #1B6B35; font-size: 14px; }
.to-top { position: fixed; right: 24px; bottom: 24px; z-index: 40; display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 999px; background: #FFFFFF; color: var(--text); box-shadow: 0 8px 24px rgba(0, 0, 0, .12); cursor: pointer; }
.mobile-bar { display: none; }
.resume-toast { position: fixed; left: 50%; bottom: 24px; z-index: 55; transform: translateX(-50%); min-height: 44px; padding: 0 20px; border: 0; border-radius: 999px; background: #0A0A0A; color: #FFFFFF; font-weight: 700; box-shadow: 0 12px 32px rgba(0, 0, 0, .3); cursor: pointer; }

/* 首页 · 学院目录 */
.btn--dark { background: #111111; color: #FFFFFF; }
.btn--dark:hover { background: #2B2D31; color: #FFFFFF; }
.section--compact { padding-block: 40px 8px; }
.home .site-main { padding-bottom: 56px; }
.home-search { padding-block: 36px 30px; background: #F5F6F8; border-bottom: 1px solid #E3E5E8; text-align: center; }
.home-search__title { font-size: 28px; font-weight: 900; color: #111111; }
.home-search__desc { margin-top: 6px; color: #5C5F66; font-size: 15px; }
.home-search__form { display: flex; align-items: center; gap: 12px; width: min(720px, 100%); height: 58px; margin: 20px auto 0; padding: 0 7px 0 22px; border: 1.5px solid #111111; border-radius: 999px; background: #FFFFFF; color: #5C5F66; }
.home-search__form input { flex: 1; min-width: 0; border: 0; background: transparent; color: #111111; font-size: 16px; outline: none; }
.home-search__form .btn { min-height: 44px; }
.home-search__form:focus-within { box-shadow: 0 0 0 4px var(--brand-soft); }
.home-search__hot { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 14px; margin-top: 14px; color: #5C5F66; font-size: 13px; }
.home-search__hot a { color: #2B2D31; }
.home-top { padding-block: 28px 8px; }
.home-top__grid { display: grid; grid-template-columns: 240px minmax(0, 1fr) 300px; gap: 20px; align-items: stretch; }
.stage-rail { display: flex; flex-direction: column; padding: 10px; border: 1px solid #E3E5E8; border-radius: 20px; background: #FFFFFF; }
.stage-rail__label { padding: 8px 12px; color: #5C5F66; font-size: 13px; font-weight: 700; }
.stage-rail__item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px; color: #111111; font-size: 15px; text-decoration: none; }
.stage-rail__item:hover { background: #F5F6F8; color: #111111; text-decoration: none; }
.stage-rail__no { width: 22px; color: var(--brand); font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stage-rail__name { flex: 1; }
.stage-rail__short { display: none; }
.stage-rail__go { color: #8A8D93; }
.stage-rail__all { margin-top: auto; border-top: 1px solid #EEF0F2; border-radius: 0 0 10px 10px; color: var(--brand); font-weight: 700; }
.featured { position: relative; display: flex; min-height: 380px; overflow: hidden; border-radius: 20px; }
.featured__slide { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 14px; padding: 44px 44px 60px; border-radius: 20px; }
.featured__badge { padding: 4px 12px; border-radius: 999px; background: rgba(0, 102, 255, .25); color: #9CC2FF; font-size: 13px; font-weight: 700; }
.featured__title { font-size: 40px; font-weight: 900; line-height: 1.25; color: #FFFFFF; }
.featured__desc { font-size: 17px; color: #E2E2E2; }
.featured__meta { font-size: 14px; color: #9A9A9A; }
.featured__slide .btn { margin-top: 8px; }
.featured__dots { position: absolute; left: 36px; bottom: 16px; display: flex; gap: 2px; }
.featured__dots button { position: relative; width: 24px; height: 24px; padding: 0; border: 0; background: transparent; cursor: pointer; }
.featured__dots button::before { content: ""; position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; border-radius: 4px; background: #555555; transform: translate(-50%, -50%); transition: width .15s; }
.featured__dots button[aria-current]::before { width: 20px; background: #FFFFFF; }
.home-aside { display: flex; flex-direction: column; gap: 16px; }
.continue-card { flex: 1; display: flex; flex-direction: column; gap: 10px; padding: 22px; border: 1px solid #E3E5E8; border-radius: 20px; background: #FFFFFF; }
.continue-card__label { color: #5C5F66; font-size: 13px; font-weight: 700; }
.continue-card__title { color: #111111; font-size: 18px; line-height: 1.45; }
.continue-card__meta { color: #5C5F66; font-size: 13px; }
.continue-card__link { display: inline-flex; align-items: center; gap: 6px; margin-top: auto; font-size: 14px; font-weight: 700; text-decoration: none; }
.progress { display: block; height: 6px; overflow: hidden; border-radius: 3px; background: #E3E5E8; }
.progress > span { display: block; width: 0; height: 100%; border-radius: 3px; background: var(--brand); }
.club-card { display: flex; flex-direction: column; gap: 6px; padding: 22px; border-radius: 20px; background: var(--brand); color: #FFFFFF; text-decoration: none; }
.club-card:hover { background: var(--brand-hover); color: #FFFFFF; text-decoration: none; }
.club-card strong { font-size: 18px; font-weight: 900; }
.club-card span { color: #D6E6FF; font-size: 14px; }
.club-card em { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-style: normal; font-weight: 700; }
.row-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 18px; }
.row-head h2 { font-size: 24px; font-weight: 900; }
.row-head small { margin-left: 8px; color: #5C5F66; font-size: 14px; font-weight: 400; }
.row-head a { display: inline-flex; flex-shrink: 0; align-items: center; gap: 4px; font-size: 14px; font-weight: 700; text-decoration: none; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; }
.two-col > * { min-width: 0; }
.list-rows { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.list-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; border: 1px solid #E3E5E8; border-radius: 16px; color: #2B2D31; text-decoration: none; }
.list-row:hover { border-color: var(--brand); text-decoration: none; }
.list-row__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.list-row__text strong { color: #111111; font-size: 16px; }
.list-row__text span { overflow: hidden; color: #5C5F66; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.list-row__cta { flex-shrink: 0; color: var(--brand); font-size: 13px; font-weight: 700; }
.tabbar { display: none; }

/* 我的学习 */
.my-learning { display: grid; gap: 16px; }
.my-course { display: grid; gap: 12px; padding: 22px; border: 1px solid #E3E5E8; border-radius: 20px; }
.my-course__head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.my-course__title { color: #111111; font-size: 18px; font-weight: 800; text-decoration: none; }
.my-course__count { color: #5C5F66; font-size: 13px; white-space: nowrap; }
.my-course__lessons { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.my-course__lessons li { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 14px; }
.my-course__lessons a { color: #2B2D31; }
.my-course .btn { justify-self: start; }
.my-clear { margin-top: 24px; text-align: center; }

/* 响应式 */
@media (max-width: 1100px) {
  .header-search { display: none; }
  .site-nav a { padding: 8px 10px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .site-nav, .header-cta { display: none; }
  .mobile-menu { display: block; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .course-hero__inner, .skill-hero, .community-band__inner { grid-template-columns: 1fr; }
  .course-hero__cover { order: -1; }
  .community-band__cta { justify-content: flex-start; }
  .reader__layout { grid-template-columns: 1fr; gap: 24px; }
  .reader__toc { position: static; max-height: none; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius-card); }
  .toc summary { padding-bottom: 0; }
  .toc[open] summary { padding-bottom: 12px; }
  .teacher-card { grid-template-columns: 1fr; padding: 32px; }
  .teacher-card__photo { max-width: 280px; }
  .site-footer__top { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 767px) {
  .site-header__inner { gap: 10px; }
  .site-header .brand--company { flex-shrink: 1; min-width: 0; }
  .site-header .brand--company .brand__name { font-size: 12px; }
  .site-header__actions { flex-shrink: 0; gap: 4px; }
  .site-header__actions > .header-link { display: none; }
  .site-header__actions > .btn { padding-inline: 12px; font-size: 12px; }
  body { font-size: 15px; }
  .section { padding-block: 56px; }
  .section--tight { padding-block: 32px 56px; }
  .hero { padding-block: 64px 56px; }
  .hero__title { font-size: 36px; }
  .hero__sub { font-size: 16px; }
  .hero__pillars { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 40px; }
  .hero__actions .btn { flex: 1 1 100%; }
  .page-hero { padding-block: 44px 40px; }
  .page-hero__title, .page-title, .course-hero__title { font-size: 28px; }
  .reader__title { font-size: 26px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .section-head--center { align-items: center; }
  .section-head__title { font-size: 24px; }
  .community-band__title { font-size: 26px; }
  .teacher-card__name { font-size: 40px; }
  .quote p { font-size: 18px; }
  .grid--2, .grid--3, .grid--4, .form-grid { grid-template-columns: 1fr; }
  .card--skill { min-height: 0; }
  .skill-card__visual { min-height: 96px; padding: 18px 20px; }
  .skill-card__icon { width: 56px; height: 56px; }
  .skill-card__body { padding: 22px 20px; }
  .card--skill .card__desc { min-height: 0; }
  .scenario { min-height: 0; }
  .lesson { flex-wrap: wrap; gap: 8px 12px; }
  .lesson__side { width: 100%; padding-left: 40px; }
  .lesson-nav { grid-template-columns: 1fr; }
  .lesson-nav__item--next { text-align: left; }
  .upsell, .mini-cta, .consult-card, .resource-hero { flex-direction: column; align-items: flex-start; }
  .download-panel { padding: 24px 20px; }
  .steps li { font-size: 12px; }
  .step-actions .btn { flex: 1; }
  .site-footer__top { grid-template-columns: 1fr 1fr; }
  .to-top { right: 16px; bottom: 88px; }
  .single-course .mobile-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: block; padding: 12px 16px calc(12px + env(safe-area-inset-bottom)); border-top: 1px solid #262626; background: #0A0A0A; }
  .single-course .site-footer { padding-bottom: 96px; }
  .big-search { flex-direction: column; }
  .auth-card { padding: 24px 20px; }
  .auth-card > h1, .account-head h1 { font-size: 26px; }
  .identity-grid { grid-template-columns: 1fr; }
  .identity-grid span { min-height: 72px; }
  .sms-row { grid-template-columns: 1fr; }
  .sms-row .btn { width: 100%; }
  .member-lock { padding: 36px 20px; }
  .member-lock__actions { width: 100%; }
  .member-lock__actions .btn { width: 100%; }
  .account-head { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* 学院目录首页与底部标签栏的响应式（放在最后，覆盖前面的规则） */
@media (max-width: 1100px) {
  .home-top__grid { grid-template-columns: 220px minmax(0, 1fr); }
  .home-aside { grid-column: 1 / -1; flex-direction: row; }
  .home-aside > * { flex: 1; }
}
@media (max-width: 900px) {
  .header-link { display: none; }
  .home-top__grid { grid-template-columns: 1fr; }
  .home-aside { flex-direction: column; }
}
@media (max-width: 767px) {
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .home-search { padding-block: 18px 20px; text-align: left; }
  .home-search__title { font-size: 22px; }
  .home-search__desc { font-size: 14px; }
  .home-search__form { height: 50px; margin-top: 14px; padding-left: 16px; }
  .home-search__form .btn { min-height: 38px; padding: 0 16px; font-size: 14px; }
  .home-search__hot { justify-content: flex-start; }
  .home-top { padding-top: 20px; }
  .stage-rail { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px 8px; padding: 0; border: 0; background: transparent; }
  .stage-rail__label, .stage-rail__name, .stage-rail__go { display: none; }
  .stage-rail__item { flex-direction: column; gap: 6px; padding: 0; font-size: 12px; text-align: center; }
  .stage-rail__item:hover { background: transparent; }
  .stage-rail__no { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: #0A0A0A; color: #FFFFFF; font-size: 15px; font-weight: 900; }
  .stage-rail__all { margin-top: 0; border-top: 0; color: #111111; font-weight: 400; }
  .stage-rail__all .stage-rail__no { background: var(--brand); }
  .stage-rail__short { display: block; color: #111111; }
  .featured { min-height: 0; }
  .featured__slide { padding: 24px 24px 44px; }
  .featured__title { font-size: 26px; }
  .featured__desc { font-size: 15px; }
  .featured__dots { left: 16px; bottom: 8px; }
  .row-head h2 { font-size: 20px; }
  .row-head small { display: block; margin: 2px 0 0; font-size: 13px; }
  .row-scroll { display: flex; gap: 12px; margin-inline: -16px; padding: 0 16px 6px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
  .row-scroll::-webkit-scrollbar { display: none; }
  .row-scroll > * { flex: 0 0 74%; scroll-snap-align: start; }
  .two-col { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .tabbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); height: calc(60px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); border-top: 1px solid #E3E5E8; background: rgba(255, 255, 255, .98); }
  .tabbar a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: #5C5F66; font-size: 11px; text-decoration: none; }
  .tabbar a[aria-current="page"] { color: var(--brand); font-weight: 700; }
  .tabbar .icon { width: 22px; height: 22px; }
  .is-reading .tabbar, .single-course .tabbar { display: none; }
  body.is-reading { padding-bottom: 0; }
  .to-top { bottom: calc(76px + env(safe-area-inset-bottom)); }
}