/* =========================================================
   铭泰科技AI学院 — 设计系统 & 全局样式
   Design System: 科技感 / 移动优先 / 无障碍
   ========================================================= */

/* ---------- 设计令牌 (Design Tokens) ---------- */
:root {
  /* 品牌色 */
  --brand-50:  #eef2ff;
  --brand-100: #e0e7ff;
  --brand-200: #c7d2fe;
  --brand-300: #a5b4fc;
  --brand-400: #818cf8;
  --brand-500: #6366f1;
  --brand-600: #4f46e5;
  --brand-700: #4338ca;
  --brand-800: #3730a3;
  --brand-900: #312e81;

  /* 强调色（青/紫渐变辅助） */
  --accent-400: #22d3ee;
  --accent-500: #06b6d4;
  --accent-600: #0891b2;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;

  /* 中性色 */
  --ink-900: #0f172a;
  --ink-800: #1e293b;
  --ink-700: #334155;
  --ink-600: #475569;
  --ink-500: #64748b;
  --ink-400: #94a3b8;
  --ink-300: #cbd5e1;
  --ink-200: #e2e8f0;
  --ink-100: #f1f5f9;
  --ink-50:  #f8fafc;
  --white:   #ffffff;

  /* 语义色 */
  --success: #16a34a;
  --warning: #d97706;
  --danger:  #dc2626;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #4f46e5 0%, #7c3aed 55%, #0891b2 100%);
  --grad-soft:  linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #ecfeff 100%);
  --grad-text:  linear-gradient(120deg, #4f46e5 0%, #8b5cf6 45%, #06b6d4 100%);

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* 间距比例 */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
  --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

  /* 圆角 */
  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 24px; --r-full: 999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.08);
  --shadow-md: 0 4px 12px rgba(15,23,42,.08), 0 2px 4px rgba(15,23,42,.06);
  --shadow-lg: 0 12px 32px rgba(79,70,229,.14), 0 4px 8px rgba(15,23,42,.06);
  --shadow-xl: 0 24px 60px rgba(79,70,229,.20);

  /* 容器 */
  --container: 1200px;
  --container-narrow: 880px;

  /* 过渡 */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --t-fast: .15s var(--ease);
  --t-base: .25s var(--ease);
  --t-slow: .4s var(--ease);
}

/* ---------- Reset & 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--ink-800);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; padding: 0; }
h1, h2, h3, h4 { line-height: 1.2; color: var(--ink-900); font-weight: 700; }
:focus-visible { outline: 3px solid var(--brand-400); outline-offset: 2px; border-radius: 4px; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }
.section { padding-block: var(--sp-20); }
.section--tight { padding-block: var(--sp-16); }

/* ---------- 文字工具 ---------- */
.gradient-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.text-center { text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: .8rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-600);
  background: var(--brand-50); padding: 6px 14px; border-radius: var(--r-full);
  margin-bottom: var(--sp-4);
}
.section-head { max-width: 680px; margin-inline: auto; margin-bottom: var(--sp-12); }
.section-head h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: var(--sp-3); }
.section-head p { color: var(--ink-600); font-size: 1.05rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  padding: 12px 24px; border-radius: var(--r-full);
  font-weight: 600; font-size: .95rem; line-height: 1;
  transition: transform var(--t-fast), box-shadow var(--t-fast), background var(--t-base), color var(--t-base);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--grad-brand); color: #fff;
  box-shadow: var(--shadow-md);
}
.btn--primary:hover { box-shadow: var(--shadow-lg); }
.btn--ghost {
  background: var(--white); color: var(--brand-700);
  border: 1.5px solid var(--brand-200);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: var(--brand-400); background: var(--brand-50); }
.btn--light {
  background: rgba(255,255,255,.15); color: #fff;
  border: 1.5px solid rgba(255,255,255,.35);
  backdrop-filter: blur(6px);
}
.btn--light:hover { background: rgba(255,255,255,.28); }
.btn--lg { padding: 15px 32px; font-size: 1.02rem; }
.btn--sm { padding: 9px 18px; font-size: .85rem; }
.btn--block { width: 100%; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--ink-200);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.card--hover:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-200);
}
.card--glass {
  background: rgba(255,255,255,.75);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.6);
}

/* ---------- 徽章 / 标签 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .78rem; font-weight: 600; padding: 4px 12px;
  border-radius: var(--r-full); background: var(--brand-50); color: var(--brand-700);
}
.badge--free { background: #ecfdf5; color: #047857; }
.badge--paid { background: #fef3c7; color: #b45309; }
.badge--hot  { background: #fee2e2; color: #b91c1c; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* ---------- 导航栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink-200);
  transition: box-shadow var(--t-base), background var(--t-base);
}
.nav.is-scrolled { box-shadow: var(--shadow-md); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: var(--sp-3); font-weight: 800; font-size: 1.12rem; color: var(--ink-900); }
.brand__logo {
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--grad-brand); display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 1.1rem; box-shadow: var(--shadow-sm);
}
.brand small { display: block; font-size: .68rem; font-weight: 600; color: var(--ink-500); letter-spacing: .04em; }
.nav__links { display: flex; align-items: center; gap: var(--sp-2); }
.nav__links a {
  padding: 8px 14px; border-radius: var(--r-full); font-weight: 500; color: var(--ink-700);
  transition: background var(--t-fast), color var(--t-fast);
}
.nav__links a:hover { background: var(--brand-50); color: var(--brand-700); }
.nav__cta { display: flex; align-items: center; gap: var(--sp-3); }
.nav__toggle { display: none; width: 44px; height: 44px; border-radius: var(--r-md); color: var(--ink-800); }
.nav__toggle svg { width: 24px; height: 24px; margin-inline: auto; }

/* 移动端菜单 */
.nav__mobile {
  display: none; position: fixed; inset: 68px 0 0; z-index: 99;
  background: var(--white); padding: var(--sp-5);
  border-top: 1px solid var(--ink-200);
  transform: translateY(-12px); opacity: 0; pointer-events: none;
  transition: opacity var(--t-base), transform var(--t-base);
  overflow-y: auto;
}
.nav__mobile.is-open { display: block; opacity: 1; transform: translateY(0); pointer-events: auto; }
.nav__mobile a {
  display: block; padding: 14px 16px; border-radius: var(--r-md);
  font-weight: 600; color: var(--ink-800); border-bottom: 1px solid var(--ink-100);
}
.nav__mobile a:hover { background: var(--brand-50); color: var(--brand-700); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--grad-soft);
  padding-block: var(--sp-20) var(--sp-16);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(540px 420px at 12% 18%, rgba(99,102,241,.20), transparent 60%),
    radial-gradient(520px 420px at 86% 22%, rgba(6,182,212,.18), transparent 60%),
    radial-gradient(600px 480px at 60% 100%, rgba(139,92,246,.16), transparent 60%);
  pointer-events: none;
}
.hero__grid {
  position: relative; display: grid; grid-template-columns: 1.1fr .9fr;
  gap: var(--sp-12); align-items: center;
}
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); letter-spacing: -.02em; margin-bottom: var(--sp-5); }
.hero p.lead { font-size: 1.15rem; color: var(--ink-600); max-width: 540px; margin-bottom: var(--sp-8); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); margin-bottom: var(--sp-8); }
.hero__stats { display: flex; gap: var(--sp-8); flex-wrap: wrap; }
.hero__stats .stat strong { font-size: 1.7rem; color: var(--ink-900); display: block; }
.hero__stats .stat span { font-size: .85rem; color: var(--ink-500); }

/* Hero 视觉卡片 */
.hero__visual { position: relative; }
.hero__panel {
  background: var(--white); border-radius: var(--r-xl);
  box-shadow: var(--shadow-xl); border: 1px solid var(--ink-200);
  padding: var(--sp-5); transform: rotate(1.5deg);
}
.hero__panel .row { display: flex; align-items: center; gap: var(--sp-3); padding: var(--sp-3) 0; border-bottom: 1px dashed var(--ink-200); }
.hero__panel .row:last-child { border-bottom: none; }
.hero__panel .dot { width: 10px; height: 10px; border-radius: 50%; }
.dot--g { background: #22c55e; } .dot--b { background: #3b82f6; } .dot--p { background: #a855f7; }
.hero__panel .bar { flex: 1; height: 8px; border-radius: var(--r-full); background: var(--ink-100); overflow: hidden; }
.hero__panel .bar > i { display: block; height: 100%; background: var(--grad-brand); border-radius: var(--r-full); }
.float-chip {
  position: absolute; background: #fff; border-radius: var(--r-md);
  box-shadow: var(--shadow-lg); padding: 10px 14px; display: flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: .85rem;
}
.float-chip .ic { width: 34px; height: 34px; border-radius: 10px; background: var(--brand-50); color: var(--brand-600); display: grid; place-items: center; }
.chip-1 { top: -18px; left: -10px; animation: float 4s var(--ease) infinite; }
.chip-2 { bottom: -16px; right: -6px; animation: float 4s var(--ease) .8s infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 学习方式 卡片 ---------- */
.mode-card { text-align: left; display: flex; flex-direction: column; gap: var(--sp-3); }
.mode-card .ic {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  background: var(--grad-brand); color: #fff; font-size: 1.5rem; box-shadow: var(--shadow-md);
}
.mode-card h3 { font-size: 1.2rem; }
.mode-card p { color: var(--ink-600); font-size: .96rem; flex: 1; }
.mode-card .more { color: var(--brand-600); font-weight: 600; font-size: .9rem; display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 进阶路径 时间线 ---------- */
.path { position: relative; }
.path__track { display: flex; flex-direction: column; gap: 0; }
.path__step { display: grid; grid-template-columns: 64px 1fr; gap: var(--sp-5); align-items: start; padding-bottom: var(--sp-8); position: relative; }
.path__step:last-child { padding-bottom: 0; }
.path__step::before {
  content: ""; position: absolute; left: 31px; top: 56px; bottom: 0; width: 2px;
  background: linear-gradient(var(--brand-200), transparent);
}
.path__step:last-child::before { display: none; }
.path__num {
  width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center;
  font-size: 1.4rem; font-weight: 800; color: #fff; background: var(--grad-brand);
  box-shadow: var(--shadow-md); position: relative; z-index: 1;
}
.path__body h3 { font-size: 1.15rem; margin-bottom: 4px; }
.path__body p { color: var(--ink-600); font-size: .95rem; }

/* ---------- 课程卡片 ---------- */
.course-card { display: flex; flex-direction: column; overflow: hidden; padding: 0; }
.course-card__cover {
  height: 168px; position: relative; display: grid; place-items: center;
  background: var(--grad-brand); color: #fff;
}
.course-card__cover .emoji { font-size: 3.2rem; filter: drop-shadow(0 6px 16px rgba(0,0,0,.25)); }
.course-card__cover .badge { position: absolute; top: 12px; left: 12px; }
.course-card__body { padding: var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-3); flex: 1; }
.course-card__cat { font-size: .8rem; color: var(--brand-600); font-weight: 600; }
.course-card__body h3 { font-size: 1.1rem; line-height: 1.35; }
.course-card__meta { display: flex; align-items: center; gap: var(--sp-4); color: var(--ink-500); font-size: .85rem; margin-top: auto; }
.course-card__meta .who { display: inline-flex; align-items: center; gap: 6px; }
.course-card__foot { display: flex; align-items: center; justify-content: space-between; padding-top: var(--sp-3); border-top: 1px solid var(--ink-100); }
.course-card__price { font-weight: 800; font-size: 1.15rem; color: var(--ink-900); }
.course-card__price small { font-weight: 500; font-size: .75rem; color: var(--ink-400); }

/* ---------- 训练营 ---------- */
.camp { position: relative; overflow: hidden; padding: var(--sp-8); display: flex; flex-direction: column; gap: var(--sp-4); }
.camp--featured { background: var(--grad-brand); color: #fff; border: none; }
.camp--featured h3, .camp--featured .camp__price { color: #fff; }
.camp--featured p, .camp--featured li { color: rgba(255,255,255,.92); }
.camp__tag { align-self: flex-start; }
.camp h3 { font-size: 1.35rem; }
.camp__price { font-size: 2rem; font-weight: 800; }
.camp__price small { font-size: .9rem; font-weight: 500; color: var(--ink-500); }
.camp--featured .camp__price small { color: rgba(255,255,255,.8); }
.camp ul { display: flex; flex-direction: column; gap: var(--sp-3); margin-block: var(--sp-2); }
.camp li { display: flex; gap: var(--sp-3); align-items: flex-start; font-size: .95rem; }
.camp li .ck { flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--brand-100); color: var(--brand-700); display: grid; place-items: center; font-size: .8rem; margin-top: 2px; }
.camp--featured li .ck { background: rgba(255,255,255,.25); color: #fff; }

/* ---------- 特性区 ---------- */
.feature { display: flex; flex-direction: column; gap: var(--sp-3); }
.feature .ic {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--brand-50); color: var(--brand-600); font-size: 1.4rem;
}
.feature h3 { font-size: 1.15rem; } .feature p { color: var(--ink-600); font-size: .95rem; }

/* ---------- CTA 区 ---------- */
.cta {
  background: var(--grad-brand); color: #fff; border-radius: var(--r-xl);
  padding: var(--sp-12); text-align: center; position: relative; overflow: hidden;
}
.cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(400px 300px at 20% 20%, rgba(255,255,255,.18), transparent 60%); }
.cta h2 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.2rem); margin-bottom: var(--sp-3); position: relative; }
.cta p { color: rgba(255,255,255,.9); max-width: 540px; margin: 0 auto var(--sp-6); position: relative; }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink-900); color: var(--ink-300); padding-block: var(--sp-16) var(--sp-8); }
.footer a { color: var(--ink-300); transition: color var(--t-fast); }
.footer a:hover { color: #fff; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--sp-8); }
.footer .brand, .footer .brand small { color: #fff; }
.footer h4 { color: #fff; font-size: .95rem; margin-bottom: var(--sp-4); }
.footer ul { display: flex; flex-direction: column; gap: var(--sp-3); font-size: .92rem; }
.footer__bottom { margin-top: var(--sp-12); padding-top: var(--sp-6); border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-3); font-size: .85rem; color: var(--ink-400); }

/* =========================================================
   课程列表 / 详情 页 专用
   ========================================================= */
.page-hero { background: var(--grad-soft); padding-block: var(--sp-16) var(--sp-12); position: relative; overflow: hidden; }
.page-hero::before { content:""; position:absolute; inset:0; background: radial-gradient(500px 360px at 85% 30%, rgba(99,102,241,.16), transparent 60%); }
.page-hero .container { position: relative; }
.page-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin-bottom: var(--sp-3); }
.page-hero p { color: var(--ink-600); font-size: 1.08rem; max-width: 600px; }

.toolbar { display: flex; flex-wrap: wrap; gap: var(--sp-3); align-items: center; justify-content: space-between; margin-bottom: var(--sp-8); }
.filters { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.chip {
  padding: 8px 16px; border-radius: var(--r-full); font-size: .9rem; font-weight: 500;
  background: var(--white); border: 1px solid var(--ink-200); color: var(--ink-600);
  transition: all var(--t-fast);
}
.chip:hover { border-color: var(--brand-300); color: var(--brand-700); }
.chip.is-active { background: var(--brand-600); border-color: var(--brand-600); color: #fff; }
.search {
  display: flex; align-items: center; gap: var(--sp-2); background: var(--white);
  border: 1px solid var(--ink-200); border-radius: var(--r-full); padding: 8px 16px; min-width: 240px;
}
.search input { border: none; outline: none; flex: 1; background: transparent; }
.search svg { width: 18px; height: 18px; color: var(--ink-400); }

/* 课程详情 */
.cd-hero { background: var(--grad-soft); padding-block: var(--sp-12); }
.cd-hero__grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--sp-10); align-items: start; }
.cd-meta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.cd-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: var(--sp-4); }
.cd-hero .lead { font-size: 1.1rem; color: var(--ink-600); margin-bottom: var(--sp-6); }
.cd-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-bottom: var(--sp-5); }
.cd-buy { position: sticky; top: 88px; }
.cd-price { display: flex; align-items: baseline; gap: var(--sp-3); margin-bottom: var(--sp-2); }
.cd-price .now { font-size: 2.2rem; font-weight: 800; color: var(--ink-900); }
.cd-price .old { color: var(--ink-400); text-decoration: line-through; }
.cd-list { display: flex; flex-direction: column; gap: var(--sp-3); margin-block: var(--sp-5); }
.cd-list li { display: flex; gap: var(--sp-3); font-size: .95rem; }
.cd-list li .ck { flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--brand-100); color: var(--brand-700); display: grid; place-items: center; font-size: .8rem; }
.cd-body { display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--sp-10); }
.syllabus { display: flex; flex-direction: column; gap: var(--sp-3); }
.syllabus__item { display: flex; gap: var(--sp-4); padding: var(--sp-4); border: 1px solid var(--ink-200); border-radius: var(--r-md); background: var(--white); }
.syllabus__item .n { flex: none; width: 34px; height: 34px; border-radius: 10px; background: var(--brand-50); color: var(--brand-700); font-weight: 700; display: grid; place-items: center; }
.syllabus__item h4 { font-size: 1rem; margin-bottom: 2px; }
.syllabus__item p { font-size: .88rem; color: var(--ink-500); }
.instructor { display: flex; gap: var(--sp-4); align-items: center; padding: var(--sp-4); border: 1px solid var(--ink-200); border-radius: var(--r-md); background: var(--white); }
.instructor .av { width: 52px; height: 52px; border-radius: 50%; background: var(--grad-brand); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 1.2rem; }

.breadcrumb { display: flex; gap: var(--sp-2); align-items: center; font-size: .85rem; color: var(--ink-500); margin-bottom: var(--sp-4); }
.breadcrumb a:hover { color: var(--brand-600); }

/* 空状态 */
.empty { text-align: center; padding: var(--sp-16) var(--sp-5); color: var(--ink-500); }
.empty .big { font-size: 3rem; margin-bottom: var(--sp-3); }

/* =========================================================
   后台管理系统 (Admin)
   ========================================================= */
.admin { min-height: 100vh; display: grid; grid-template-columns: 248px 1fr; background: var(--ink-50); }
.admin__side { background: var(--ink-900); color: #fff; padding: var(--sp-6) var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-2); position: sticky; top: 0; height: 100vh; }
.admin__side .brand { color: #fff; margin-bottom: var(--sp-6); }
.admin__side .brand small { color: var(--ink-400); }
.admin__nav { display: flex; flex-direction: column; gap: 4px; }
.admin__nav a {
  display: flex; align-items: center; gap: var(--sp-3); padding: 11px 14px; border-radius: var(--r-md);
  color: var(--ink-300); font-weight: 500; font-size: .95rem; transition: background var(--t-fast), color var(--t-fast);
}
.admin__nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.admin__nav a.is-active { background: var(--brand-600); color: #fff; }
.admin__nav a .ic { font-size: 1.1rem; }
.admin__side .foot { margin-top: auto; font-size: .8rem; color: var(--ink-400); }
.admin__main { padding: var(--sp-8); overflow: auto; }
.admin__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--sp-8); gap: var(--sp-4); flex-wrap: wrap; }
.admin__top h1 { font-size: 1.6rem; }
.admin__top p { color: var(--ink-500); font-size: .95rem; }
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); margin-bottom: var(--sp-8); }
.stat-card { background: var(--white); border: 1px solid var(--ink-200); border-radius: var(--r-lg); padding: var(--sp-5); box-shadow: var(--shadow-sm); }
.stat-card .k { font-size: .85rem; color: var(--ink-500); margin-bottom: 6px; }
.stat-card .v { font-size: 1.9rem; font-weight: 800; color: var(--ink-900); }
.stat-card .v small { font-size: .9rem; font-weight: 500; color: var(--ink-400); }

.panel { background: var(--white); border: 1px solid var(--ink-200); border-radius: var(--r-lg); padding: var(--sp-6); box-shadow: var(--shadow-sm); margin-bottom: var(--sp-6); }
.panel__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--sp-5); gap: var(--sp-3); flex-wrap: wrap; }
.panel__head h2 { font-size: 1.2rem; }
.panel__head p { font-size: .9rem; color: var(--ink-500); }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-5); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: .88rem; font-weight: 600; color: var(--ink-700); }
.field input, .field textarea, .field select {
  padding: 11px 14px; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  background: var(--white); transition: border-color var(--t-fast), box-shadow var(--t-fast); width: 100%;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--brand-400); box-shadow: 0 0 0 3px var(--brand-100); }
.field textarea { resize: vertical; min-height: 96px; }
.field .hint { font-size: .78rem; color: var(--ink-400); }

.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--ink-100); font-size: .9rem; }
.admin-table th { color: var(--ink-500); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.admin-table tbody tr:hover { background: var(--ink-50); }
.admin-table .cov { width: 44px; height: 44px; border-radius: 10px; background: var(--grad-brand); color: #fff; display: grid; place-items: center; font-size: 1.3rem; }
.row-actions { display: flex; gap: var(--sp-2); }
.icon-btn { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: var(--ink-100); color: var(--ink-600); transition: background var(--t-fast), color var(--t-fast); }
.icon-btn:hover { background: var(--brand-100); color: var(--brand-700); }
.icon-btn--danger:hover { background: #fee2e2; color: var(--danger); }

.modal-backdrop { position: fixed; inset: 0; background: rgba(15,23,42,.5); backdrop-filter: blur(3px); display: none; align-items: center; justify-content: center; z-index: 200; padding: var(--sp-5); }
.modal-backdrop.is-open { display: flex; }
.modal { background: var(--white); border-radius: var(--r-xl); width: 100%; max-width: 640px; max-height: 90vh; overflow-y: auto; padding: var(--sp-8); box-shadow: var(--shadow-xl); animation: pop .25s var(--ease); }
@keyframes pop { from { transform: scale(.96); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--sp-5); }
.modal__head h3 { font-size: 1.3rem; }
.modal__close { width: 38px; height: 38px; border-radius: 10px; background: var(--ink-100); color: var(--ink-600); display: grid; place-items: center; }
.modal__foot { display: flex; justify-content: flex-end; gap: var(--sp-3); margin-top: var(--sp-6); }

.admin-login { min-height: 100vh; display: grid; place-items: center; background: var(--grad-soft); padding: var(--sp-5); }
.login-card { background: #fff; border-radius: var(--r-xl); box-shadow: var(--shadow-xl); padding: var(--sp-10); width: 100%; max-width: 400px; border: 1px solid var(--ink-200); }
.login-card .brand { justify-content: center; margin-bottom: var(--sp-6); }
.login-card h2 { text-align: center; margin-bottom: var(--sp-2); }
.login-card > p { text-align: center; color: var(--ink-500); margin-bottom: var(--sp-6); font-size: .9rem; }

.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--ink-900); color: #fff; padding: 12px 22px; border-radius: var(--r-full); font-size: .92rem; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: opacity var(--t-base), transform var(--t-base); z-index: 300; }
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* =========================================================
   响应式断点
   ========================================================= */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; gap: var(--sp-10); }
  .hero__visual { max-width: 460px; }
  .cd-hero__grid, .cd-body { grid-template-columns: 1fr; gap: var(--sp-8); }
  .cd-buy { position: static; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .admin { grid-template-columns: 1fr; }
  .admin__side { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .admin__side .foot { display: none; }
  .admin__nav { flex-direction: row; flex-wrap: wrap; }
}
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle { display: grid; place-items: center; }
  .nav__cta .btn--ghost { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding-block: var(--sp-16); }
  .hero { padding-block: var(--sp-16) var(--sp-12); }
  .footer__grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .form-grid { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search { min-width: 0; }
  .cta { padding: var(--sp-8) var(--sp-5); }
  .stat-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .hero__stats { gap: var(--sp-5); }
  .hero__stats .stat strong { font-size: 1.4rem; }
  .float-chip { display: none; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* 打印友好 */
@media print {
  .nav, .footer, .cta, .hero__visual { display: none !important; }
}

/* ================= 报名 / 咨询页 ================= */
.consult-wrap { max-width: 780px; }
.consult-card { padding: var(--sp-8); }
.consult-card form { margin: 0; }
.consult-done { text-align: center; padding: var(--sp-12) var(--sp-6); }
.consult-done .done-ic { font-size: 3.2rem; margin-bottom: var(--sp-4); }
.consult-done h2 { margin-bottom: var(--sp-3); }
.consult-done p { color: var(--ink-600); }

/* ================= 联系信息卡片（后台可配置） ================= */
.contact-card { padding: var(--sp-8); text-align: center; }
.contact-card h3 { margin-bottom: var(--sp-5); }
.contact-card__body { display: flex; gap: var(--sp-8); align-items: center; justify-content: center; flex-wrap: wrap; text-align: left; }
.contact-qr { flex: 0 0 auto; text-align: center; }
.contact-qr img { width: 132px; height: 132px; border-radius: var(--r-lg); border: 1px solid var(--ink-200); object-fit: cover; background: var(--white); }
.contact-qr span { display: block; margin-top: 8px; font-size: .82rem; color: var(--ink-400); }
.contact-list { list-style: none; display: grid; gap: var(--sp-3); min-width: 260px; }
.contact-list li { display: grid; grid-template-columns: 24px 72px 1fr; align-items: center; gap: var(--sp-2); font-size: .95rem; padding-bottom: var(--sp-3); border-bottom: 1px dashed var(--ink-100); }
.contact-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-list .lb { color: var(--ink-400); font-size: .85rem; }
.contact-list .vl { color: var(--ink-800); font-weight: 600; word-break: break-all; }
.contact-list .vl a { color: var(--brand-700); }
.contact-note { margin-top: var(--sp-5); font-size: .88rem; color: var(--ink-400); }

/* ================= 后台报名线索 ================= */
.status-pill { display: inline-block; padding: 4px 12px; border-radius: var(--r-full); font-size: .78rem; font-weight: 600; border: 1px solid transparent; }
.status-pill--new { background: #fef9c3; color: #854d0e; border-color: #fde68a; }
.status-pill--contacted { background: #dbeafe; color: #1e40af; border-color: #bfdbfe; }
.status-pill--won { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.status-pill--closed { background: var(--ink-100); color: var(--ink-500); border-color: var(--ink-200); }
.lead-table td { vertical-align: top; }
.lead-phone { white-space: nowrap; font-variant-numeric: tabular-nums; }
.lead-note { max-width: 260px; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.lead-status-select { border: 1px solid var(--ink-200); border-radius: 8px; padding: 6px 8px; font-size: .85rem; background: var(--white); color: var(--ink-700); }

/* ================= 全站联系浮窗 (FAB) ================= */
.fab-root {
  position: fixed; right: var(--sp-5); bottom: var(--sp-5); z-index: 320;
  display: flex; flex-direction: column; align-items: flex-end; gap: var(--sp-3);
}
.fab-btn {
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--grad-brand); color: #fff; box-shadow: var(--shadow-lg);
  display: grid; place-items: center; position: relative;
  transition: transform var(--t-fast), box-shadow var(--t-base);
}
.fab-btn:hover { transform: translateY(-2px) scale(1.04); box-shadow: var(--shadow-xl); }
.fab-btn:active { transform: scale(.96); }
.fab-btn svg { width: 26px; height: 26px; }
.fab-dot {
  position: absolute; top: 11px; right: 12px; width: 11px; height: 11px;
  border-radius: 50%; background: #22c55e; border: 2px solid #fff;
}
.fab-panel {
  width: 320px; max-width: calc(100vw - 32px);
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-lg);
  box-shadow: var(--shadow-xl); padding: var(--sp-5);
  transform: translateY(10px) scale(.96); opacity: 0; pointer-events: none;
  transform-origin: bottom right;
  transition: opacity var(--t-base), transform var(--t-base);
}
.fab-panel.is-open { transform: translateY(0) scale(1); opacity: 1; pointer-events: auto; }
.fab-panel__head { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: var(--sp-4); }
.fab-panel__head strong { font-size: 1.1rem; color: var(--ink-900); display: block; }
.fab-panel__sub { font-size: .8rem; color: var(--ink-400); }
.fab-panel__close { width: 34px; height: 34px; border-radius: 9px; background: var(--ink-100); color: var(--ink-600); display: grid; place-items: center; flex: none; }
.fab-panel__close:hover { background: var(--brand-100); color: var(--brand-700); }
.fab-qr { text-align: center; padding: var(--sp-4) 0; border-bottom: 1px dashed var(--ink-100); margin-bottom: var(--sp-4); }
.fab-qr img { width: 150px; height: 150px; border-radius: var(--r-md); border: 1px solid var(--ink-200); object-fit: cover; background: #fff; }
.fab-qr span { display: block; margin-top: 8px; font-size: .85rem; color: var(--ink-400); }
.fab-list { list-style: none; display: grid; gap: var(--sp-3); }
.fab-list li { display: grid; grid-template-columns: 22px 60px 1fr auto; align-items: center; gap: var(--sp-2); font-size: .92rem; }
.fab-list .ic { font-size: 1.05rem; }
.fab-list .lb { color: var(--ink-400); font-size: .82rem; }
.fab-list .vl { color: var(--ink-800); font-weight: 600; word-break: break-all; }
.fab-list .vl a { color: var(--brand-700); }
.fab-copy {
  flex: none; padding: 4px 10px; border-radius: var(--r-full); font-size: .76rem; font-weight: 600;
  background: var(--brand-50); color: var(--brand-700); transition: background var(--t-fast);
}
.fab-copy:hover { background: var(--brand-100); }
.fab-note { margin-top: var(--sp-4); font-size: .82rem; color: var(--ink-400); border-top: 1px dashed var(--ink-100); padding-top: var(--sp-3); }

@media (max-width: 480px) {
  .fab-root { right: var(--sp-4); bottom: var(--sp-4); }
  .fab-btn { width: 52px; height: 52px; }
  .fab-btn svg { width: 24px; height: 24px; }
}

/* ================= 备案信息栏 ================= */
.beian-bar {
  background: var(--ink-900);
  color: var(--ink-400);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: var(--sp-3) 0;
  font-size: .82rem;
  text-align: center;
}
.beian-bar a { color: var(--ink-300); transition: color var(--t-fast); }
.beian-bar a:hover { color: #fff; }
.beian-bar span { display: inline-block; margin: 0 var(--sp-2); }
@media (max-width: 480px) { .beian-bar { font-size: .75rem; line-height: 1.7; } }