/* ==========================================================================
 * 云栈工坊 YunZhan Lab · 视觉层「开发者实验室 / Lab Instrument」
 * 方案4：操作色=青蓝 #38BDF8，点缀=琥珀 #F5A524；深/浅双主题
 * 字体：Chakra Petch(展示) / IBM Plex Mono(标签) / IBM Plex Sans+Noto Sans SC(正文)
 * ======================================================================== */

/* DARK（默认） */
:root, [data-theme="dark"] {
  --bg: #0E1218;
  --bg-soft: #141A22;
  --panel: #171E28;
  --panel2: #1C2530;
  --raise: #1F2A38;
  --line: #232C3A;
  --line-bright: #334155;
  --text: #E7EDF3;
  --muted: #94A3B3;
  --faint: #5E6B7D;

  --primary: #38BDF8;
  --primary-hover: #65D0FA;
  --primary-press: #0EA5E9;
  --on-primary: #04161F;
  --primary-soft: rgba(56,189,248,.1);
  --primary-line: rgba(56,189,248,.35);

  --accent: #F5A524;
  --accent-hover: #FFBE4D;
  --on-accent: #1A1200;
  --accent-soft: rgba(245,165,36,.1);
  --accent-line: rgba(245,165,36,.4);

  --danger: #FF6B57;
  --hero-glow: rgba(56,189,248,.22);
  --led-glow: rgba(245,165,36,.55);
  --grid-line: rgba(56,189,248,.05);
  --shadow: none;

  --mono: "IBM Plex Mono", "Cascadia Code", "Cascadia Mono", Consolas, "Courier New", monospace;
  --disp: "Chakra Petch", "Bahnschrift", var(--mono);
  --body: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei UI", system-ui, sans-serif;
  --maxw: 1200px;
  --radius: 10px;
  --radius-sm: 6px;
}

/* LIGHT（精调，非反色） */
[data-theme="light"] {
  --bg: #E7EEF6;
  --bg-soft: #D9E4F0;
  --panel: #FFFFFF;
  --panel2: #F2F6FB;
  --raise: #FFFFFF;
  --line: #C7D4E4;
  --line-bright: #A9BBD0;
  --text: #0D1A29;
  --muted: #46586E;
  --faint: #75869C;

  --primary: #0284C7;
  --primary-hover: #0369A1;
  --primary-press: #075985;
  --on-primary: #FFFFFF;
  --primary-soft: rgba(2,132,199,.12);
  --primary-line: rgba(2,132,199,.45);

  --accent: #B45309;
  --accent-hover: #92400E;
  --on-accent: #FFFFFF;
  --accent-soft: #FEF3C7;
  --accent-line: rgba(180,83,9,.4);

  --danger: #DC2626;
  --hero-glow: rgba(2,132,199,.18);
  --led-glow: rgba(180,83,9,.5);
  --grid-line: rgba(15,40,70,.06);
  --shadow: 0 12px 34px rgba(15,40,70,.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
  transition: background .2s ease, color .2s ease;
}
/* 蓝图网格 + 扫描线：非常克制，跟随主题 */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 0%, #000 30%, transparent 100%);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(127,127,127,.03) 0 1px, transparent 1px 3px);
}
header, main, footer, .toast, .modal-mask, .lightbox { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
::selection { background: var(--primary-soft); color: var(--text); }

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

/* 等宽小标签 // 前缀 */
.mono { font-family: var(--mono); }
.kicker {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--primary); display: inline-flex; align-items: center; gap: 8px;
}
.kicker::before { content: "//"; color: var(--faint); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--disp); font-weight: 700; font-size: 17px; letter-spacing: .02em; flex-shrink: 0; }
.brand > span:last-child { white-space: nowrap; }
.brand .logo-mark {
  width: 30px; height: 30px; border-radius: 7px;
  background: var(--panel2); border: 1px solid var(--line-bright);
  display: flex; align-items: center; justify-content: center; color: var(--primary); flex: 0 0 auto;
}
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  padding: 7px 13px; border-radius: var(--radius-sm); color: var(--muted);
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .08em; transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--panel2); }
.nav-links a.active { color: var(--primary); background: var(--primary-soft); box-shadow: inset 0 0 0 1px var(--primary-line); }
.nav-right { display: flex; align-items: center; gap: 10px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm); font-weight: 600; font-size: 14px;
  font-family: var(--mono); letter-spacing: .03em; white-space: nowrap;
  transition: transform .06s, background .15s, border-color .15s, color .15s, box-shadow .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--primary); color: var(--on-primary); font-weight: 700;
  box-shadow: 0 0 0 1px var(--primary-line), 0 0 22px var(--hero-glow);
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line-bright); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-orange-soft { background: var(--primary-soft); color: var(--primary); border: 1px solid var(--primary-line); }
.btn-orange-soft:hover { background: color-mix(in srgb, var(--primary) 18%, transparent); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.icon-btn {
  width: 34px; height: 34px; border-radius: var(--radius-sm); display: inline-flex;
  align-items: center; justify-content: center; color: var(--muted); transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--panel2); color: var(--primary); }

/* ---------- 标签 / 状态 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px; border-radius: 4px; font-family: var(--mono);
  font-size: 11px; letter-spacing: .06em; font-weight: 500;
  border: 1px solid transparent;
}
.tag-green { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-line); }
.tag-orange { background: var(--primary-soft); color: var(--primary); border-color: var(--primary-line); }
.tag-muted { background: var(--panel2); color: var(--muted); border-color: var(--line); }

/* ---------- 区块标题 ---------- */
.section { padding: 54px 0; }
.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 6px; }
.section-bar { width: 8px; height: 8px; background: var(--primary); box-shadow: 0 0 10px var(--hero-glow); align-self: center; }
.section-title { font-family: var(--disp); font-size: 23px; font-weight: 700; letter-spacing: .01em; }
.section-sub { color: var(--muted); margin-bottom: 26px; font-size: 14px; }
.section-index { font-family: var(--mono); color: var(--faint); font-size: 12px; letter-spacing: .1em; }

/* ---------- 课程仪器模块 tile ---------- */
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.course-card {
  position: relative; display: flex; flex-direction: column; cursor: pointer;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; min-height: 168px; overflow: hidden;
  transition: border-color .18s, transform .18s, background .18s;
}
.course-card::before { /* 顶部扫描线 */
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0; transition: opacity .25s;
}
.course-card:hover { border-color: var(--primary-line); background: var(--panel2); transform: translateY(-3px); }
.course-card:hover::before { opacity: 1; }
.cc-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cc-no { font-family: var(--mono); font-size: 11px; letter-spacing: .15em; color: var(--faint); }
.cc-led {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  opacity: .5; box-shadow: 0 0 0 0 var(--led-glow); transition: all .2s;
}
.course-card:hover .cc-led { background: var(--accent); opacity: 1; box-shadow: 0 0 10px var(--led-glow); }
.course-body { display: flex; flex-direction: column; gap: 8px; flex: 1; min-width: 0; }
.course-title {
  font-size: 14.5px; font-weight: 600; line-height: 1.5; color: var(--text);
  overflow-wrap: break-word; word-break: break-word;
}
.cc-meta { display: flex; gap: 12px; font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: .04em; }
.cc-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line); }
.price { color: var(--accent); font-family: var(--mono); font-weight: 600; font-size: 17px; }
.price small { font-size: 11px; color: var(--faint); }
.price-origin { color: var(--faint); font-size: 12px; text-decoration: line-through; margin-left: 6px; font-weight: 400; }
.cc-arrow { color: var(--faint); font-family: var(--mono); transition: transform .18s, color .18s; }
.course-card:hover .cc-arrow { transform: translateX(4px); color: var(--primary); }

/* 研发中（draft）课程卡片：琥珀徽标 + 虚线边，不显示价格 */
.course-card.is-draft { border-style: dashed; opacity: .82; }
.course-card.is-draft:hover { opacity: 1; }
.course-card.is-draft::before { background: linear-gradient(90deg, transparent, var(--accent), transparent); }
.draft-ribbon {
  font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  color: var(--accent); border: 1px solid var(--accent); border-radius: 3px;
  padding: 2px 7px; white-space: nowrap;
}
.draft-note { color: var(--accent); font-family: var(--mono); font-size: 12px; letter-spacing: .05em; }

/* 旧 cover 区（详情 gallery / 免费页）：暗屏面板 */
.course-cover {
  position: relative; height: 150px; display: flex; align-items: center; justify-content: center;
  background: var(--panel2); border: 1px solid var(--line); border-radius: var(--radius-sm);
  color: var(--primary); overflow: hidden; margin-bottom: 12px;
}
.course-cover::after {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 4px);
}
.course-cover .cover-icon { width: 46px; height: 46px; position: relative; z-index: 1; }

/* 首页旗舰推荐块 */
.lab-feature {
  margin-top: 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; position: relative; overflow: hidden; transition: border-color .2s; box-shadow: var(--shadow);
}
.lab-feature::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--primary), transparent 70%); }
a:hover .lab-feature { border-color: var(--primary-line); }
.lab-feature-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.lab-feature-title { font-family: var(--disp); font-size: 22px; line-height: 1.35; margin-bottom: 8px; }
.lab-feature-sub { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.lab-feature-foot { display: flex; align-items: baseline; gap: 12px; padding-top: 16px; border-top: 1px solid var(--line); }
.lab-feature-foot .cc-arrow { margin-left: auto; color: var(--primary); font-family: var(--mono); font-size: 13px; }

/* ---------- Hero（满版出血） ---------- */
.hero {
  position: relative; min-height: calc(100svh - 60px); display: flex; align-items: center;
  margin-top: 0; padding: 80px 0; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: 78% center; opacity: .55; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(14,16,19,.96) 0%, rgba(14,16,19,.78) 40%, rgba(14,16,19,.25) 70%, rgba(14,16,19,.55) 100%);
}
.hero-inner { position: relative; z-index: 1; max-width: 560px; }
.hero .boot-line {
  font-family: var(--mono); font-size: 12.5px; color: var(--primary); letter-spacing: .08em;
  margin-bottom: 22px; min-height: 20px; white-space: pre-line; line-height: 1.7;
}
.hero .boot-line .cursor { display: inline-block; width: 8px; height: 14px; background: var(--primary); vertical-align: middle; animation: blink 1s steps(1) infinite; margin-left: 2px; }
@keyframes blink { 50% { opacity: 0; } }
.hero h1 {
  font-family: var(--disp); font-size: clamp(32px, 5vw, 56px); line-height: 1.08; font-weight: 700;
  letter-spacing: -.01em; margin: 0 0 18px; color: #fff;
}
.hero h1 .accent { color: var(--accent-hover); }
.hero p.lead { color: #B8C4D0; font-size: 16px; max-width: 480px; line-height: 1.7; }
.hero .hero-actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono);
  color: var(--primary); border: 1px solid var(--primary-line); background: var(--primary-soft);
  padding: 5px 12px; border-radius: 4px; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--led-glow); animation: blink 1.6s infinite; }
/* 入场编排 */
.hero .boot-line, .hero h1, .hero p.lead, .hero .hero-actions { opacity: 0; transform: translateY(14px); animation: rise .7s ease forwards; }
.hero .boot-line { animation-delay: .1s; }
.hero h1 { animation-delay: .3s; }
.hero p.lead { animation-delay: .5s; }
.hero .hero-actions { animation-delay: .7s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* 非首页 hero（custom/free）改为面板式 */
.hero.panel-hero { min-height: auto; display: block; }
.hero.panel-hero h1 { color: var(--text); }
.hero.panel-hero h1 .accent { color: var(--primary); }
.hero.panel-hero p.lead { color: var(--muted); }

/* ---------- LIGHT：首页满版 Hero 保持深色照片场（图片本为黑色，不被浅底洗白） ---------- */
[data-theme="light"] .hero:not(.panel-hero) .hero-bg { background: #0B0E13; }
[data-theme="light"] .hero:not(.panel-hero) .hero-bg img { opacity: 1; }
[data-theme="light"] .hero:not(.panel-hero) .hero-bg::after {
  /* 只压暗左侧文字列，向右收干净，让工作台照片本体显露 */
  background: linear-gradient(90deg, rgba(8,10,14,.92) 0%, rgba(8,10,14,.80) 32%, rgba(8,10,14,.46) 56%, rgba(8,10,14,0) 76%);
}
[data-theme="light"] .hero:not(.panel-hero) .hero-bg::before {
  /* 底部短距离收进浅色页面，避免黑图与浅底之间出现硬切边 */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to top, var(--bg) 0px, color-mix(in srgb, var(--bg) 70%, transparent) 34px, transparent 84px);
}
/* 深底上的文字/按钮固定为暗主题发光配色，不跟随 light 令牌 */
[data-theme="light"] .hero:not(.panel-hero) h1 .accent { color: #FFBE4D; }
[data-theme="light"] .hero:not(.panel-hero) .boot-line { color: #38BDF8; }
[data-theme="light"] .hero:not(.panel-hero) .boot-line .cursor { background: #38BDF8; }
[data-theme="light"] .hero:not(.panel-hero) .btn-primary {
  background: #38BDF8; color: #04161F;
  box-shadow: 0 0 0 1px rgba(56,189,248,.35), 0 0 22px rgba(56,189,248,.22);
}
[data-theme="light"] .hero:not(.panel-hero) .btn-primary:hover { background: #65D0FA; }
[data-theme="light"] .hero:not(.panel-hero) .btn-ghost { color: #E7EDF3; border-color: rgba(231,237,243,.32); }
[data-theme="light"] .hero:not(.panel-hero) .btn-ghost:hover { color: #38BDF8; border-color: #38BDF8; }

/* ---------- 分类入口 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cat-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; cursor: pointer; transition: border-color .18s, transform .18s; position: relative; overflow: hidden;
}
.cat-card:hover { border-color: var(--primary-line); transform: translateY(-3px); }
.cat-card .cat-icon {
  width: 40px; height: 40px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: var(--primary); margin-bottom: 14px; background: var(--panel2); border: 1px solid var(--line);
}
.cat-card h3 { font-family: var(--disp); font-size: 17px; margin-bottom: 6px; color: var(--text); }
.cat-card p { color: var(--muted); font-size: 13px; }
.cat-card .cat-no { position: absolute; top: 16px; right: 18px; font-family: var(--mono); font-size: 11px; color: var(--faint); }

/* ---------- 工具条 ---------- */
.toolbar {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; margin: 28px 0 24px;
}
.filter-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.filter-row:last-child { margin-bottom: 0; }
.filter-label { color: var(--faint); font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; margin-right: 4px; }
.chip {
  padding: 6px 14px; border-radius: var(--radius-sm); background: var(--panel2); border: 1px solid var(--line);
  color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: .04em; transition: all .15s;
}
.chip:hover { border-color: var(--line-bright); color: var(--text); }
.chip.active { background: var(--primary-soft); color: var(--primary); border-color: var(--primary-line); }
.search-box {
  display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 8px 14px; min-width: 240px; flex: 0 1 320px;
}
.search-box:focus-within { border-color: var(--primary); }
.search-box input { border: none; outline: none; flex: 1; background: transparent; color: var(--text); }
.search-box input::placeholder { color: var(--faint); }
.search-box svg { color: var(--faint); }
.toolbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
select.sort-select {
  padding: 8px 12px; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--bg); color: var(--text); outline: none; cursor: pointer; font-family: var(--mono); font-size: 12.5px;
}
select.sort-select option { background: var(--panel); color: var(--text); }

/* ---------- 详情页 ---------- */
.breadcrumb { color: var(--faint); font-family: var(--mono); font-size: 12px; margin: 26px 0 20px; letter-spacing: .03em; }
.breadcrumb a:hover { color: var(--primary); }
.detail-layout { display: grid; grid-template-columns: 1.35fr 1fr; gap: 26px; align-items: start; }
.gallery-main {
  border-radius: var(--radius); overflow: hidden; height: 360px; cursor: zoom-in;
  display: flex; align-items: center; justify-content: center; color: var(--primary);
  background: var(--panel2); border: 1px solid var(--line); position: relative;
}
.gallery-main::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 4px); }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; }
.gallery-thumb {
  width: 78px; height: 58px; border-radius: var(--radius-sm); overflow: hidden; cursor: pointer;
  border: 1px solid var(--line); display: flex; align-items: center; justify-content: center;
  color: var(--primary); background: var(--panel2);
}
.gallery-thumb.active { border-color: var(--primary); }
.buy-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; position: sticky; top: 80px; box-shadow: var(--shadow);
}
.buy-card h1 { font-family: var(--disp); font-size: 21px; line-height: 1.35; margin: 10px 0 8px; }
.buy-card .sub { color: var(--muted); font-size: 13.5px; margin-bottom: 14px; }
.buy-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; }
.buy-price { display: flex; align-items: baseline; gap: 10px; margin: 16px 0 20px; }
.buy-price .now { color: var(--accent); font-family: var(--mono); font-size: 32px; font-weight: 600; }
.buy-actions { display: flex; flex-direction: column; gap: 11px; }

/* 研发中课程：预告横幅 + 禁用购买 */
.is-draft-card { border-style: dashed; border-color: var(--accent); }
.draft-banner {
  display: flex; align-items: flex-start; gap: 10px; margin: 4px 0 18px;
  padding: 13px 15px; border: 1px solid var(--accent); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  color: var(--text); font-size: 13px; line-height: 1.7;
}
.draft-banner svg { flex: none; margin-top: 2px; color: var(--accent); }
.btn[disabled], .btn:disabled {
  opacity: .5; cursor: not-allowed; filter: grayscale(.4); pointer-events: none;
}
.draft-empty { color: var(--muted); font-size: 13.5px; line-height: 1.8; padding: 8px 2px; }

.spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.spec-item { background: var(--bg); border-radius: var(--radius-sm); padding: 14px; border: 1px solid var(--line); }
.spec-item .k { color: var(--faint); font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 5px; }
.spec-item .v { font-weight: 600; font-size: 14px; }

.info-block { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-top: 20px; }
.info-block h2 { font-family: var(--disp); font-size: 18px; margin-bottom: 16px; display: flex; align-items: center; gap: 9px; }
.info-block h2 svg { color: var(--primary); }
.include-list { display: flex; flex-wrap: wrap; gap: 8px; }
.include-chip { display: inline-flex; align-items: center; gap: 6px; background: var(--panel2); color: var(--text); border: 1px solid var(--line); padding: 6px 12px; border-radius: var(--radius-sm); font-size: 13px; }
.include-chip svg { color: var(--primary); }
.role-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.role-box { background: var(--bg); border-radius: var(--radius-sm); padding: 18px; border: 1px solid var(--line); }
.role-box h4 { margin-bottom: 10px; color: var(--primary); font-family: var(--mono); font-size: 13px; letter-spacing: .05em; }
.role-box ul { list-style: none; }
.role-box li { padding: 5px 0 5px 18px; position: relative; color: var(--text); font-size: 14px; }
.role-box li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 5px; height: 5px; background: var(--primary); }
.innov-list { list-style: none; }
.innov-list li { padding: 8px 0 8px 26px; position: relative; line-height: 1.7; }
.innov-list li::before { content: "▸"; position: absolute; left: 4px; color: var(--primary); }

/* ---------- 大纲 ---------- */
.syllabus-chapter { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 10px; overflow: hidden; background: var(--bg); }
.syllabus-chapter > .ch-head {
  padding: 13px 16px; background: var(--panel2); font-weight: 600; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; font-size: 14px;
}
.syllabus-chapter > .ch-head:hover { color: var(--primary); }
.lesson-row { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-top: 1px solid var(--line); font-size: 13.5px; }
.lesson-row > span:first-child { font-family: var(--mono); color: var(--faint); font-size: 12px; }
.lesson-row .free-tag { margin-left: auto; }
.lesson-row .dur { color: var(--faint); font-family: var(--mono); font-size: 11.5px; margin-left: auto; }
.lesson-row .free-tag { margin-left: 8px; }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 8px; overflow: hidden; background: var(--bg); }
.faq-q { padding: 14px 16px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 14px; }
.faq-q:hover { color: var(--primary); }
.faq-q .chev { transition: transform .2s; color: var(--faint); }
.faq-item.open .faq-q .chev { transform: rotate(180deg); color: var(--primary); }
.faq-a { padding: 0 16px; max-height: 0; overflow: hidden; transition: max-height .25s, padding .25s; color: var(--muted); font-size: 13.5px; }
.faq-item.open .faq-a { max-height: 320px; padding: 12px 16px; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(5,6,8,.78); z-index: 100;
  display: none; align-items: center; justify-content: center; padding: 20px; backdrop-filter: blur(4px);
}
.modal-mask.show { display: flex; }
.modal {
  background: var(--panel); border: 1px solid var(--line-bright); border-radius: var(--radius); width: 100%; max-width: 460px;
  padding: 24px; box-shadow: 0 24px 60px rgba(0,0,0,.5); animation: pop .18s ease;
}
@keyframes pop { from { transform: translateY(10px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-head h3 { font-family: var(--disp); font-size: 18px; }
.modal-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; color: var(--muted); }
.modal-row > span:last-child { color: var(--text); }
.modal-row.total { border-top: 1px dashed var(--line-bright); margin-top: 6px; padding-top: 14px; font-weight: 700; font-size: 16px; color: var(--text); }
.modal-row.total > span:last-child { color: var(--accent); font-family: var(--mono); }
.modal-footnote { text-align: center; color: var(--faint); font-size: 12px; margin-top: 12px; }
.modal-footnote a { color: var(--primary); }
.check-row { display: flex; align-items: flex-start; gap: 8px; font-size: 12.5px; color: var(--muted); margin: 14px 0; line-height: 1.6; }
.check-row input { margin-top: 3px; accent-color: var(--primary); }
.check-row a { color: var(--primary); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%) translateY(20px);
  background: var(--raise); color: var(--text); border: 1px solid var(--primary-line); padding: 11px 20px; border-radius: var(--radius-sm);
  font-size: 13.5px; font-family: var(--mono); z-index: 200; opacity: 0; pointer-events: none; transition: all .25s;
  box-shadow: 0 0 20px var(--hero-glow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 订单 ---------- */
.order-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.order-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; margin-top: 16px;
}
.order-card h3 { overflow-wrap: break-word; word-break: break-word; }
.order-top { display: flex; align-items: center; gap: 10px; color: var(--faint); font-family: var(--mono); font-size: 12px; flex-wrap: wrap; }
.order-top .copy-btn { color: var(--faint); display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.order-top .copy-btn:hover { color: var(--primary); }
.order-title { font-family: var(--disp); font-size: 17px; font-weight: 600; margin: 14px 0 10px; }
.order-includes { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.order-amount { color: var(--accent); font-family: var(--mono); font-weight: 600; font-size: 22px; }
.order-time { color: var(--faint); font-size: 12.5px; margin-top: 6px; font-family: var(--mono); }
.order-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }
.delivery-box {
  margin-top: 16px; background: var(--accent-soft); border-radius: var(--radius-sm); padding: 18px;
  border: 1px solid var(--accent-line);
}
.delivery-box h4 { color: var(--accent); margin-bottom: 12px; display: flex; align-items: center; gap: 7px; font-size: 14px; }
.dl-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 13.5px; }
.dl-row .k { color: var(--accent); font-family: var(--mono); min-width: 70px; font-size: 12px; }
.dl-row .v { word-break: break-all; color: var(--text); }
.dl-row .copy-btn { color: var(--accent); cursor: pointer; display: inline-flex; }
.file-list { margin-top: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; }
.file-list li { list-style: none; padding: 3px 0; font-size: 13px; color: var(--muted); font-family: var(--mono); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--faint); }

/* ---------- 定制页 ---------- */
.step-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.step-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.step-num { color: var(--primary); font-family: var(--mono); font-weight: 600; font-size: 14px; }
.step-card h4 { margin: 8px 0 6px; font-size: 15px; }
.step-card p { color: var(--muted); font-size: 13px; }
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tech-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-soft); color: var(--muted); margin-top: 70px; padding: 46px 0 26px; border-top: 1px solid var(--line); }
.footer-cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.site-footer h4 { color: var(--text); font-family: var(--mono); font-size: 12px; letter-spacing: .15em; text-transform: uppercase; margin-bottom: 14px; }
.site-footer a { color: var(--muted); display: block; padding: 4px 0; font-size: 13px; transition: color .15s; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 18px; text-align: center; font-size: 12px; color: var(--faint); font-family: var(--mono); letter-spacing: .04em; }

/* ---------- 灯箱 ---------- */
.lightbox { position: fixed; inset: 0; background: rgba(5,6,8,.92); z-index: 150; display: none; align-items: center; justify-content: center; padding: 30px; cursor: zoom-out; }
.lightbox.show { display: flex; }
.lightbox .lb-inner { width: 100%; max-width: 860px; height: 70vh; border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--primary); background: var(--panel2); border: 1px solid var(--line-bright); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .detail-layout { grid-template-columns: 1fr; }
  .buy-card { position: static; }
  .feat-grid, .tech-grid, .step-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .hero-bg img { object-position: 70% center; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { min-height: auto; padding: 56px 0; }
  .hero-inner { max-width: 100%; }
  /* 浅主题移动版 Hero 底边收短，不侵入按钮区域（底部留白仅 56px） */
  [data-theme="light"] .hero:not(.panel-hero) .hero-bg::before {
    background: linear-gradient(to top, var(--bg) 0px, color-mix(in srgb, var(--bg) 70%, transparent) 22px, transparent 52px);
  }
  .card-grid, .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .role-cols { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .card-grid { grid-template-columns: 1fr; }
  .feat-grid, .tech-grid, .step-grid { grid-template-columns: 1fr; }
  .search-box { flex: 1 1 100%; }
  .toolbar-right { margin-left: 0; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}
#themeToggle svg { transition: transform .18s ease; }
#themeToggle:hover svg { transform: rotate(20deg); }