/* ============================================================
   三河市谦承益职业技能培训学校 · 官网样式
   设计风格：赛博青 + 极夜蓝 + 鎏金（631 配色）
   主色 60% 极夜蓝 / 辅色 30% 冷灰白 / 点睛 10% 赛博青
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 背景层 - 极夜蓝系 */
  --bg: #0B0F19;
  --bg-2: #0F1522;
  --bg-3: #141B2C;

  /* 赛博青（点睛 10%） */
  --cyan: #06B6D4;
  --cyan-bright: #22D3EE;
  --cyan-soft: rgba(6, 182, 212, 0.12);

  /* 鎏金（品牌印记 · logo / CTA） */
  --gold: #C9A876;
  --gold-light: #E5C68F;
  --gold-soft: rgba(201, 168, 118, 0.12);

  /* 文字 */
  --text: #E2E8F0;
  --text-2: #A3B0C6;

  --muted: #6E7B90;

  --border: #232D45;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-strong: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-border-hover: rgba(34, 211, 238, 0.35);
  --glass-blur: blur(18px);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.38);
  --glass-shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 24px rgba(6, 182, 212, 0.12);

  --gradient-ai: linear-gradient(135deg, #0EA5E9 0%, #06B6D4 50%, #22D3EE 100%);
  --gradient-cta: linear-gradient(135deg, #E5C68F 0%, #C9A876 55%, #A98460 100%);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-kai: "Noto Serif SC", "KaiTi", "STKaiti", serif;

  --radius: 16px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --pill: 999px;

  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --fast: 200ms;
  --base: 360ms;
  --slow: 720ms;

  --container: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  position: relative;
}

/* 全站科技网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 10%, rgba(6, 182, 212, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(201, 168, 118, 0.05) 0%, transparent 60%),
    linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
  background-size: auto, auto, 80px 80px, 80px 80px;
  pointer-events: none;
  z-index: 0;
}

img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--fast) var(--ease-out); }
button { font-family: inherit; cursor: pointer; border: none; background: none; padding: 0; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.22;
  color: var(--text);
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
}
p { margin: 0 0 1rem; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }
.section { padding: 5.5rem 0; position: relative; }

.section-head { text-align: center; margin-bottom: 3rem; }
.section-head .eyebrow {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--cyan-bright);
  margin-bottom: 1rem;
  position: relative;
  padding: 0 3rem;
}
.section-head .eyebrow::before,
.section-head .eyebrow::after {
  content: "";
  position: absolute; top: 50%;
  width: 36px; height: 1px;
  background: var(--cyan);
}
.section-head .eyebrow::before { right: 100%; }
.section-head .eyebrow::after { left: 100%; }
.section-head h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); margin-bottom: 0.7rem; }
.section-head h2 em { font-style: normal; color: var(--cyan-bright); }
.section-head p { color: var(--text-2); max-width: 640px; margin: 0 auto; font-size: 1.05rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.9rem;
  font-family: var(--font-serif);
  font-size: 1rem; font-weight: 500; letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--base) var(--ease-out);
  white-space: nowrap;
}
.btn .arrow { transition: transform var(--base) var(--ease-out); }
.btn:hover .arrow { transform: translateX(4px); }

.btn-cta {
  background: var(--gradient-cta);
  color: #1A1206;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(201, 168, 118, 0.35);
  position: relative;
  overflow: hidden;
}
.btn-cta::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(100deg, transparent 0%, rgba(255, 255, 255, 0.55) 50%, transparent 100%);
  transform: skewX(-20deg);
  animation: btnShine 3.2s var(--ease-soft) infinite;
}
@keyframes btnShine {
  0%, 60% { left: -120%; }
  100% { left: 160%; }
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(201, 168, 118, 0.5); color: #1A1206; }

.btn-primary {
  background: var(--gradient-ai);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(6, 182, 212, 0.45); color: #fff; }

.btn-ghost {
  background: rgba(226, 232, 240, 0.04);
  color: var(--text);
  border-color: rgba(226, 232, 240, 0.4);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: var(--cyan-bright); color: var(--cyan-bright); background: rgba(6, 182, 212, 0.08); }

.btn-outline { background: transparent; color: var(--cyan-bright); border-color: var(--cyan); }
.btn-outline:hover { background: var(--cyan); color: #FFFFFF; }

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky; top: 0; left: 0; right: 0; z-index: 900;
  padding: 0.9rem 0;
  isolation: isolate;
  transition: padding var(--base) var(--ease-out);
}
.navbar::before {
  content: "";
  position: absolute; inset: 0;
  background: rgba(11, 15, 25, 0.55);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  z-index: -1;
  transition: background var(--base) var(--ease-out);
}
.navbar.scrolled { padding: 0.55rem 0; }
.navbar.scrolled::before {
  background: rgba(11, 15, 25, 0.9);
  border-bottom: 1px solid rgba(6, 182, 212, 0.25);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.navbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand { display: flex; align-items: center; gap: 0.6rem; flex-shrink: 0; }
.brand-mark { height: 48px; width: auto; display: flex; align-items: center; }
.brand-mark img { height: 100%; width: auto; object-fit: contain; }
.brand-divider { width: 1px; height: 34px; background: linear-gradient(180deg, transparent, rgba(6,182,212,0.7) 50%, transparent); margin: 0 0.3rem; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-family: var(--font-serif); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.04em; white-space: nowrap; }
.brand-en { font-size: 0.55rem; letter-spacing: 0.18em; opacity: 0.7; white-space: nowrap; }

.nav-menu { display: flex; align-items: center; gap: 1.4rem; list-style: none; margin: 0; padding: 0; }
.nav-link {
  position: relative;
  font-family: var(--font-serif);
  font-size: 0.95rem; font-weight: 500; letter-spacing: 0.1em;
  color: var(--text);
  padding: 0.4rem 0;
  white-space: nowrap;
}
.nav-link::after {
  content: "";
  position: absolute; left: 50%; bottom: -2px;
  width: 0; height: 1px;
  background: var(--gold-light);
  transition: all var(--base) var(--ease-out);
  transform: translateX(-50%);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover { color: var(--gold-light); }
.nav-cta { margin-left: 0.5rem; padding: 0.55rem 1.4rem; font-size: 0.9rem; }

.nav-toggle { display: none; width: 34px; height: 34px; position: relative; }
.nav-toggle span { display: block; position: absolute; left: 5px; right: 5px; height: 1.5px; background: currentColor; transition: all var(--base) var(--ease-out); }
.nav-toggle span:nth-child(1) { top: 10px; }
.nav-toggle span:nth-child(2) { top: 16px; }
.nav-toggle span:nth-child(3) { top: 22px; }
.nav-toggle.open span:nth-child(1) { top: 16px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 16px; transform: rotate(-45deg); }

.nav-overlay { position: fixed; inset: 0; background: rgba(11,15,25,0.75); backdrop-filter: blur(4px); z-index: 890; opacity: 0; pointer-events: none; transition: opacity var(--base); }
.nav-overlay.show { opacity: 1; pointer-events: auto; }

/* ---------- Hero 首屏（视频优先 + 咨询卡） ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem 0 4rem;
  overflow: hidden;
}
.hero-video-wrap { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero-video-wrap video {
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero-video-mask {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 11, 20, 0.82) 0%, rgba(11, 15, 25, 0.55) 42%, rgba(11, 15, 25, 0.35) 65%, rgba(6, 11, 20, 0.7) 100%),
    linear-gradient(180deg, rgba(11, 15, 25, 0.5) 0%, transparent 30%, transparent 65%, rgba(11, 15, 25, 0.85) 100%);
}
.hero-grid-fx {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse at 30% 40%, black 10%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, black 10%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-family: var(--font-serif);
  font-size: 0.9rem; font-weight: 500; letter-spacing: 0.14em;
  padding: 8px 1.1rem;
  color: var(--text);
  background: linear-gradient(135deg, rgba(6,182,212,0.18), rgba(56,189,248,0.12));
  border: 1px solid rgba(103, 232, 249, 0.45);
  border-radius: var(--pill);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 24px rgba(6, 182, 212, 0.22), inset 0 1px 0 rgba(255,255,255,0.12);
  margin-bottom: 1.6rem;
}
.hero-eyebrow::before {
  content: "";
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--cyan-bright);
  box-shadow: 0 0 12px var(--cyan-bright), 0 0 0 4px rgba(34,211,238,0.25);
  flex-shrink: 0;
}
.hero-eyebrow::after {
  content: "官方资质";
  font-family: var(--font-sans);
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.2em;
  color: #FFFFFF;
  background: var(--gradient-ai);
  padding: 3px 10px;
  border-radius: var(--pill);
  white-space: nowrap;
  flex-shrink: 0;
}

.hero-title {
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.18;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.04em;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(120deg, #67E8F9 0%, #22D3EE 45%, #A5F3FC 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 0 22px rgba(6, 182, 212, 0.45));
  position: relative;
}
.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  color: rgba(226, 232, 240, 0.8);
  margin-bottom: 1.2rem;
  letter-spacing: 0.05em;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.hero-tag {
  font-size: 0.78rem; letter-spacing: 0.08em;
  color: var(--text-2);
  padding: 4px 12px;
  border: 1px solid rgba(226, 232, 240, 0.18);
  border-radius: var(--pill);
  background: rgba(255,255,255,0.03);
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.hero-watch {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: rgba(226,232,240,0.85);
  font-size: 0.95rem; letter-spacing: 0.05em;
}
.hero-watch:hover { color: var(--cyan-bright); }
.hero-watch .play-dot {
  width: 40px; height: 40px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 18px rgba(6, 182, 212, 0.3);
  flex-shrink: 0;
}
.hero-watch .play-dot svg { margin-left: 2px; }

/* 首屏咨询卡 —— 转化核心 */
.quick-consult {
  position: relative;
  background: linear-gradient(160deg, rgba(20, 27, 44, 0.82), rgba(15, 21, 34, 0.9));
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(6, 182, 212, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  padding: 1.8rem 1.7rem 1.6rem;
  overflow: hidden;
}
.quick-consult::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--cyan-bright), var(--gold));
  opacity: 0.9;
}
.quick-consult::after {
  content: "咨询";
  position: absolute;
  right: -14px; bottom: -30px;
  font-family: var(--font-kai);
  font-size: 7.5rem; font-weight: 700;
  color: rgba(6, 182, 212, 0.05);
  pointer-events: none;
  line-height: 1;
}
.qc-head { margin-bottom: 1.2rem; position: relative; z-index: 1; }
.qc-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; letter-spacing: 0.2em;
  color: var(--gold-light);
  background: var(--gold-soft);
  border: 1px solid rgba(201, 168, 118, 0.35);
  padding: 3px 12px;
  border-radius: var(--pill);
  margin-bottom: 0.7rem;
}
.qc-title { font-size: 1.35rem; margin-bottom: 0.35rem; }
.qc-title em { font-style: normal; color: var(--gold-light); }
/* 「免费」高亮：用于所有转化标题，务必保持最醒目 */
.free-hl {
  font-style: normal;
  font-weight: 700;
  color: var(--gold-light);
  font-size: 1.3em;
  letter-spacing: 0.02em;
  margin-right: 0.06em;
  text-shadow: 0 0 22px rgba(229, 198, 143, 0.5), 0 0 44px rgba(201, 168, 118, 0.28);
}
.contact-form-card h2 .free-hl { font-size: 1.22em; }
.qc-sub { font-size: 0.85rem; color: var(--text-2); margin: 0; }

.qc-form { position: relative; z-index: 1; }
.qc-field { margin-bottom: 0.85rem; }
.qc-field label {
  display: block;
  font-size: 0.78rem; letter-spacing: 0.1em;
  color: var(--text-2);
  margin-bottom: 0.35rem;
}
.qc-field label b { color: var(--cyan-bright); font-weight: 400; }
.qc-input, .qc-select, .qc-textarea {
  width: 100%;
  padding: 0.72rem 0.95rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text);
  background: rgba(11, 15, 25, 0.6);
  border: 1px solid rgba(226, 232, 240, 0.16);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--fast) var(--ease-out);
}
.qc-input::placeholder, .qc-textarea::placeholder { color: var(--muted); }
.qc-input:focus, .qc-select:focus, .qc-textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
  background: rgba(11, 15, 25, 0.8);
}
.qc-select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--cyan-bright) 50%), linear-gradient(135deg, var(--cyan-bright) 50%, transparent 50%); background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%; background-size: 5px 5px; background-repeat: no-repeat; }
.qc-select option { background: var(--bg-3); color: var(--text); }
.qc-submit {
  width: 100%;
  padding: 0.9rem;
  font-family: var(--font-serif);
  font-size: 1.05rem; font-weight: 700; letter-spacing: 0.2em;
  color: #1A1206;
  background: var(--gradient-cta);
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 22px rgba(201, 168, 118, 0.4);
  transition: all var(--base) var(--ease-out);
  margin-top: 0.3rem;
}
.qc-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(201, 168, 118, 0.55); }
.qc-submit:disabled { opacity: 0.6; cursor: wait; transform: none; }
.qc-privacy {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; color: var(--muted);
  margin: 0.7rem 0 0;
}
.qc-privacy svg { flex-shrink: 0; }
.qc-msg { font-size: 0.82rem; margin: 0.6rem 0 0; min-height: 1.2em; }
.qc-msg.err { color: #F87171; }
.qc-success { text-align: center; padding: 1.6rem 0.5rem; position: relative; z-index: 1; }
.qc-success .ok-ring {
  width: 64px; height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.12);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.35);
  animation: popIn 0.5s var(--ease-out);
}
@keyframes popIn { from { transform: scale(0.4); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.qc-success h4 { font-size: 1.2rem; color: var(--cyan-bright); margin-bottom: 0.4rem; }
.qc-success p { font-size: 0.85rem; color: var(--text-2); margin: 0 0 1rem; }
.qc-success .qc-again { color: var(--gold-light); font-size: 0.82rem; text-decoration: underline; text-underline-offset: 4px; }

/* ---------- 数据条 ---------- */
.stats-strip {
  position: relative;
  margin-top: 3.2rem;
  padding: 1.4rem 0.5rem;
  background: rgba(15, 21, 34, 0.55);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.stat { text-align: center; padding: 0 0.6rem; position: relative; }
.stat + .stat::before {
  content: "";
  position: absolute; left: 0; top: 15%; bottom: 15%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(103, 232, 249, 0.35) 20%, rgba(103, 232, 249, 0.35) 80%, transparent);
}
.stat-value {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
  text-shadow: 0 0 24px rgba(6, 182, 212, 0.18);
}
.stat-value .unit { font-size: 0.5em; color: var(--cyan-bright); }
.stat-label { font-size: 0.78rem; color: rgba(226, 232, 240, 0.65); letter-spacing: 0.15em; margin-top: 0.3rem; }

.scroll-hint {
  position: absolute;
  bottom: 1.4rem; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--cyan-bright);
  opacity: 0.7;
  display: flex; flex-direction: column; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; letter-spacing: 0.3em;
  font-family: var(--font-serif);
  animation: hintFloat 2.4s var(--ease-soft) infinite;
}
.scroll-hint::after { content: ""; width: 1px; height: 30px; background: linear-gradient(var(--cyan-bright), transparent); }
@keyframes hintFloat { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 6px); } }

/* ---------- 视频墙（视频优先核心区） ---------- */
.video-section { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); overflow: hidden; }

.video-wall {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}
.video-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all var(--base) var(--ease-out);
  min-height: 150px;
}
.video-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-4px);
}
.video-card.featured {
  grid-row: span 2;
  min-height: 420px;
}
.video-card .vc-media {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.video-card .vc-mask {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,15,25,0.05) 30%, rgba(11,15,25,0.88) 100%);
  transition: background var(--base) var(--ease-out);
}
.video-card:hover .vc-mask { background: linear-gradient(180deg, rgba(11,15,25,0.0) 10%, rgba(11,15,25,0.85) 100%); }
.vc-play {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 58px; height: 58px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.22);
  border: 1px solid rgba(34, 211, 238, 0.6);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 26px rgba(6, 182, 212, 0.35);
  transition: all var(--base) var(--ease-out);
  z-index: 2;
}
.video-card:hover .vc-play { transform: translate(-50%, -50%) scale(1.12); background: rgba(6, 182, 212, 0.4); }
.vc-play svg { margin-left: 3px; }
.vc-info { position: absolute; left: 0; right: 0; bottom: 0; padding: 1rem 1.15rem; z-index: 2; }
.vc-info h3 {
  font-size: 1.05rem; margin: 0 0 0.25rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.video-card.featured .vc-info h3 { font-size: 1.4rem; }
.vc-cat {
  font-size: 0.66rem; letter-spacing: 0.15em;
  color: #06121F;
  background: var(--gradient-ai);
  padding: 2px 9px;
  border-radius: var(--pill);
  font-family: var(--font-sans);
  font-weight: 600;
  flex-shrink: 0;
}
.vc-meta { font-size: 0.78rem; color: rgba(226, 232, 240, 0.65); display: flex; align-items: center; gap: 0.5rem; }
.vc-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--cyan-bright); }
.vc-duration {
  position: absolute; top: 0.8rem; right: 0.8rem;
  font-size: 0.68rem;
  color: var(--text);
  background: rgba(11, 15, 25, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.15);
  padding: 2px 8px;
  border-radius: var(--pill);
  z-index: 2;
  font-variant-numeric: tabular-nums;
}

/* ---------- 课程 ---------- */
.courses-section { background: linear-gradient(180deg, var(--bg-2), var(--bg-3)); }
.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.2rem; }
.course-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  padding: 1.7rem 1.4rem 1.4rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--base) var(--ease-out);
  overflow: hidden;
}
.course-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-bright));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--base) var(--ease-out);
}
.course-card:hover { transform: translateY(-8px); box-shadow: var(--glass-shadow-hover); border-color: var(--glass-border-hover); }
.course-card:hover::before { transform: scaleX(1); }
.course-tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--cyan-soft);
  color: var(--cyan-bright);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  border-radius: var(--pill);
  margin-bottom: 1rem;
  border: 1px solid rgba(6, 182, 212, 0.25);
}
.course-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.08);
  color: var(--cyan-bright);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 50%;
  margin-bottom: 1rem;
  font-family: var(--font-kai);
  font-size: 1.3rem; font-weight: 600;
  transition: all var(--base) var(--ease-out);
}
.course-card:hover .course-icon { transform: rotate(-8deg) scale(1.06); background: rgba(6, 182, 212, 0.22); }
.course-card h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
.course-card > p { color: var(--text-2); font-size: 0.88rem; line-height: 1.7; min-height: 4.4em; }
.course-meta {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--border);
  font-size: 0.8rem; color: var(--muted);
}
.course-ask {
  color: var(--gold-light);
  font-family: var(--font-serif);
  display: inline-flex; align-items: center; gap: 0.3rem;
  transition: all var(--fast) var(--ease-out);
}
.course-ask:hover { color: var(--gold); letter-spacing: 0.18em; }

/* 七大环节 */
.flow-panel {
  margin-top: 3.5rem;
  padding: 2.8rem 2.2rem;
  border-radius: calc(var(--radius-lg) + 6px);
  background:
    radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.16), transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(34, 211, 238, 0.1), transparent 50%),
    linear-gradient(135deg, var(--bg-2), var(--bg-3) 50%, var(--bg-2));
  border: 1px solid rgba(6, 182, 212, 0.28);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.flow-steps { display: grid; grid-template-columns: repeat(7, 1fr); gap: 0.8rem; margin-top: 2.2rem; }
.flow-step { text-align: center; position: relative; padding: 0 0.3rem; transition: transform var(--base) var(--ease-out); }
.flow-step:hover { transform: translateY(-4px); }
.flow-num {
  width: 46px; height: 46px;
  margin: 0 auto 0.8rem;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  color: var(--cyan-bright);
  font-family: var(--font-serif);
  font-size: 1.05rem; font-weight: 600;
  background: rgba(6, 182, 212, 0.1);
  box-shadow: 0 0 14px rgba(6, 182, 212, 0.25);
  position: relative;
}
.flow-step:not(:last-child) .flow-num::after {
  content: "";
  position: absolute; top: 50%; left: calc(100% + 3px);
  width: calc(100% - 46px + 0.8rem);
  height: 1px;
  background: linear-gradient(90deg, rgba(6, 182, 212, 0.55), transparent);
}
.flow-title { font-family: var(--font-serif); font-size: 0.92rem; font-weight: 600; letter-spacing: 0.08em; margin-bottom: 0.3rem; }
.flow-desc { font-size: 0.72rem; color: rgba(226, 232, 240, 0.55); line-height: 1.5; }

/* ---------- 师资 ---------- */
.team-section { background: linear-gradient(180deg, var(--bg-3), var(--bg-2)); }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.team-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  transition: all var(--base) var(--ease-out);
}
.team-card:hover { transform: translateY(-6px); border-color: var(--glass-border-hover); box-shadow: var(--glass-shadow-hover); }
.team-photo {
  position: relative;
  aspect-ratio: 3 / 3.4;
  overflow: hidden;
  background: var(--bg-3);
}
.team-photo img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform var(--slow) var(--ease-out); }
.team-card:hover .team-photo img { transform: scale(1.05); }
.team-photo::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(11, 15, 25, 0.92) 100%);
}
.team-rank {
  position: absolute; top: 0.8rem; left: 0.8rem;
  font-size: 0.68rem; letter-spacing: 0.15em;
  color: var(--gold-light);
  background: rgba(11, 15, 25, 0.75);
  border: 1px solid rgba(201, 168, 118, 0.45);
  padding: 3px 10px;
  border-radius: var(--pill);
  z-index: 2;
  backdrop-filter: blur(6px);
}
.team-body { position: absolute; left: 0; right: 0; bottom: 0; padding: 0 1.1rem 1rem; z-index: 2; }
.team-body h3 { font-size: 1.2rem; margin: 0 0 0.2rem; }
.team-role { font-size: 0.74rem; color: var(--gold-light); letter-spacing: 0.15em; margin-bottom: 0.5rem; }
.team-bio {
  font-size: 0.78rem; color: rgba(226, 232, 240, 0.72);
  line-height: 1.6;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: all var(--base) var(--ease-out);
}
/* 简介内容较丰富，展开高度放宽，避免悬停时末行被裁切 */
.team-card:hover .team-bio { max-height: 13em; opacity: 1; }
/* 简介展开后上沿会压到较亮的人像区，同步加深底部蒙版保证对比度 */
.team-card:hover .team-photo::after { background: linear-gradient(180deg, transparent 26%, rgba(11, 15, 25, 0.97) 78%); }

/* ---------- 优势 ---------- */
.adv-section { background: linear-gradient(180deg, var(--bg-2), var(--bg)); }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.adv-card {
  position: relative;
  padding: 1.6rem 1.4rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--base) var(--ease-out);
  overflow: hidden;
}
.adv-card::after {
  content: attr(data-num);
  position: absolute; top: 0.9rem; right: 1.1rem;
  font-family: var(--font-kai);
  font-size: 2.2rem; font-weight: 700;
  color: rgba(6, 182, 212, 0.1);
  line-height: 1;
}
.adv-card:hover { transform: translateY(-5px); background: var(--glass-strong); border-color: var(--glass-border-hover); box-shadow: var(--glass-shadow-hover); }
.adv-card h3 { font-size: 1.1rem; color: var(--cyan-bright); margin-bottom: 0.6rem; }
.adv-card p { font-size: 0.86rem; color: var(--text-2); margin: 0; line-height: 1.7; }

/* ---------- 资讯 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.news-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  transition: all var(--base) var(--ease-out);
  display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-5px); border-color: var(--glass-border-hover); box-shadow: var(--glass-shadow-hover); }
.news-meta { display: flex; align-items: center; gap: 0.6rem; font-size: 0.74rem; color: var(--muted); margin-bottom: 0.7rem; }
.news-cat {
  font-size: 0.68rem; letter-spacing: 0.1em;
  color: var(--cyan-bright);
  background: var(--cyan-soft);
  padding: 2px 9px;
  border-radius: var(--pill);
}
.news-card h3 { font-size: 1.02rem; line-height: 1.5; margin-bottom: 0.5rem; }
.news-card p { font-size: 0.84rem; color: var(--text-2); flex: 1; margin-bottom: 0.8rem; }
.news-more { font-size: 0.82rem; color: var(--cyan-bright); letter-spacing: 0.1em; }

/* ---------- 咨询专区（全站底部转化区） ---------- */
.consult-band {
  position: relative;
  padding: 5rem 0;
  background:
    radial-gradient(circle at 12% 25%, rgba(6, 182, 212, 0.2), transparent 50%),
    radial-gradient(circle at 88% 75%, rgba(201, 168, 118, 0.12), transparent 50%),
    linear-gradient(135deg, #071018 0%, #0D1626 50%, #101B30 100%);
  border-top: 1px solid rgba(6, 182, 212, 0.3);
  border-bottom: 1px solid rgba(34, 211, 238, 0.2);
  overflow: hidden;
}
.consult-band::after {
  content: "AI";
  position: absolute;
  right: -2%; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-serif);
  font-size: 26rem;
  color: rgba(6, 182, 212, 0.045);
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
}
.consult-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.consult-info .eyebrow-sm {
  display: inline-block;
  font-size: 0.78rem; letter-spacing: 0.3em;
  color: var(--gold-light);
  border: 1px solid rgba(201, 168, 118, 0.4);
  background: var(--gold-soft);
  padding: 4px 14px;
  border-radius: var(--pill);
  margin-bottom: 1.2rem;
}
.consult-info h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); margin-bottom: 0.8rem; }
.consult-info h2 em { font-style: normal; color: var(--cyan-bright); }
.consult-info > p { color: var(--text-2); margin-bottom: 1.8rem; }
.contact-lines { display: grid; gap: 0.9rem; margin-bottom: 1.6rem; }
.contact-item { display: flex; align-items: center; gap: 0.9rem; }
.contact-item .ci-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--cyan-bright);
  flex-shrink: 0;
}
.contact-item .ci-body b { display: block; font-family: var(--font-serif); font-size: 1.05rem; letter-spacing: 0.04em; color: var(--text); }
.contact-item .ci-body span { font-size: 0.76rem; color: var(--muted); }
.qr-row { display: flex; align-items: center; gap: 1rem; }
.qr-box {
  width: 108px;
  padding: 8px;
  background: #FFFFFF;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.qr-box img { border-radius: 6px; }
.qr-tip { font-size: 0.8rem; color: var(--text-2); line-height: 1.6; }
.qr-tip b { color: var(--gold-light); }

.consult-form-card {
  background: linear-gradient(160deg, rgba(20, 27, 44, 0.9), rgba(15, 21, 34, 0.95));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  padding: 2rem 1.9rem;
  position: relative;
  overflow: hidden;
}
.consult-form-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--cyan));
}

/* ---------- 咨询坞（悬浮） ---------- */
.dock {
  position: fixed;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 800;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.dock-btn {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  background: rgba(15, 21, 34, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--cyan-bright);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  transition: all var(--base) var(--ease-out);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  position: relative;
}
.dock-btn:hover { background: rgba(6, 182, 212, 0.2); border-color: var(--cyan-bright); transform: translateX(-4px); }

/* ---------- 悬浮坞：电话 / 微信 悬停面板 ---------- */
.dock-item { position: relative; }
/* 按钮与面板之间有 14px 空隙，插一条隐形「桥」，
   否则鼠标移向面板的途中会脱离 hover，面板立刻收起（点不到里面的号码/二维码） */
.dock-item::after {
  content: "";
  position: absolute;
  left: -16px; top: 0;
  width: 16px; height: 100%;
}
.dock-pop {
  position: absolute;
  right: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%) scale(0.9);
  transform-origin: right center;
  background: #FFFFFF;
  border-radius: 14px;
  padding: 10px;
  /* 只给了 right，宽度会按 .dock-item（仅 56px 宽的按钮）算可用空间而被挤扁，
     必须显式让宽度由内容决定 */
  width: max-content;
  max-width: calc(100vw - 140px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--fast) var(--ease-out), transform var(--fast) var(--ease-out), visibility var(--fast) var(--ease-out);
}
.dock-item:hover .dock-pop,
.dock-item:focus-within .dock-pop,
.dock-pop.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(-50%) scale(1);
}
.dp-head {
  font-size: 0.72rem; font-weight: 700; color: #0F172A; letter-spacing: 0.06em;
  padding: 2px 4px 8px; border-bottom: 1px dashed #E2E8F0; margin-bottom: 6px;
}

/* 电话面板：三位老师直线 */
.dock-pop-list { width: 216px; }
.dp-row {
  display: flex; align-items: center; justify-content: space-between; gap: 0.6rem;
  padding: 9px 10px; border-radius: 10px;
  transition: background var(--fast) var(--ease-out), transform var(--fast) var(--ease-out);
}
.dp-row + .dp-row { margin-top: 2px; }
.dp-row b { font-family: var(--font-serif); font-size: 0.85rem; color: #0F172A; letter-spacing: 0.04em; }
.dp-row span { font-size: 0.82rem; font-weight: 700; color: #0E7490; font-variant-numeric: tabular-nums; }
.dp-row:hover { background: #ECFEFF; transform: translateX(-2px); }
.dp-row:hover span { color: #0891B2; }

/* 微信面板：三位老师二维码横排 */
.dock-pop-qr { padding: 12px; }
.dp-qrs { display: flex; gap: 10px; }
.dp-qrs figure { margin: 0; text-align: center; }
.dp-qrs img { display: block; width: 104px; height: 104px; object-fit: contain; border-radius: 8px; background: #FFFFFF; }
.dp-qrs figcaption { margin-top: 5px; font-size: 0.72rem; font-weight: 600; color: #334155; }

/* ---------- 视频弹窗播放器 ---------- */
.vmodal { position: fixed; inset: 0; z-index: 950; display: flex; align-items: center; justify-content: center; }
.vmodal[hidden] { display: none; }
.vmodal-mask { position: absolute; inset: 0; background: rgba(4, 7, 12, 0.88); backdrop-filter: blur(8px); }
.vmodal-box {
  position: relative;
  width: min(920px, 92vw);
  background: var(--bg-2);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7), 0 0 60px rgba(6, 182, 212, 0.1);
  overflow: hidden;
  animation: popIn 0.35s var(--ease-out);
}
.vmodal-media { width: 100%; aspect-ratio: 16 / 9; background: #000; }
.vmodal-media video, .vmodal-media audio { width: 100%; height: 100%; }
.vmodal-meta { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.9rem 1.2rem; }
.vmodal-meta h3 { margin: 0; font-size: 1.1rem; }
.vmodal-meta p { margin: 0; font-size: 0.8rem; color: var(--muted); }
.vmodal-close {
  position: absolute; top: 0.7rem; right: 0.7rem;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(11, 15, 25, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.25);
  color: var(--text);
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  z-index: 3;
  transition: all var(--fast) var(--ease-out);
}
.vmodal-close:hover { background: rgba(6, 182, 212, 0.3); border-color: var(--cyan-bright); transform: rotate(90deg); }

/* ---------- 页脚 ---------- */
.footer { background: #050B16; padding: 4rem 0 2rem; position: relative; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  padding-bottom: 2.2rem;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid rgba(6, 182, 212, 0.15);
}
.footer-brand p { font-size: 0.85rem; color: rgba(226, 232, 240, 0.6); max-width: 320px; margin-top: 1rem; }
.footer-socials { display: flex; gap: 0.7rem; margin-top: 1.1rem; }
.footer-socials a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 50%;
  font-size: 0.8rem; font-family: var(--font-serif);
  color: rgba(241, 245, 249, 0.7);
  transition: all var(--base) var(--ease-out);
}
.footer-socials a:hover { background: var(--gradient-ai); color: #0B0F19; border-color: transparent; transform: translateY(-2px); }
.footer-col h4 { color: var(--cyan-bright); font-size: 0.95rem; letter-spacing: 0.2em; margin-bottom: 1.1rem; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 0.7rem; }
.footer-col a { font-size: 0.85rem; color: rgba(226, 232, 240, 0.65); }
.footer-col a::before { content: "· "; color: var(--cyan); }
.footer-col a:hover { color: var(--gold-light); }
.footer-contact { font-size: 0.85rem; color: rgba(226, 232, 240, 0.7); display: grid; gap: 0.7rem; }
.footer-contact b { color: var(--text); font-family: var(--font-serif); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  font-size: 0.74rem; color: rgba(241, 245, 249, 0.4);
}
.footer-bottom a:hover { color: var(--cyan-bright); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  bottom: 1.6rem; right: 1.6rem;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(15, 21, 34, 0.85);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--cyan-bright);
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  z-index: 700;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--base) var(--ease-out);
  backdrop-filter: blur(10px);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
/* 滚到表单/页脚区域时自动隐藏：避免圆钮压住输入框，导致点输入框反而跳回顶部 */
.to-top.hide { opacity: 0 !important; pointer-events: none !important; transform: translateY(10px); }
.to-top:hover { background: var(--cyan); color: #06121F; box-shadow: 0 0 24px rgba(6, 182, 212, 0.5); }

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative;
  padding: 8.5rem 0 4rem;
  background:
    radial-gradient(circle at 18% 20%, rgba(6, 182, 212, 0.14), transparent 45%),
    radial-gradient(circle at 85% 60%, rgba(201, 168, 118, 0.08), transparent 45%),
    linear-gradient(180deg, #0A0F1A, var(--bg-2));
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.04) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse at 30% 40%, black 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, black 10%, transparent 78%);
}
.page-hero .container { position: relative; z-index: 1; }
.crumb { font-size: 0.8rem; color: var(--muted); letter-spacing: 0.1em; margin-bottom: 1rem; }
.crumb a { color: var(--text-2); }
.crumb a:hover { color: var(--cyan-bright); }
.crumb .sep { margin: 0 0.5rem; color: var(--border); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 0.8rem; }
.page-hero h1 em { font-style: normal; color: var(--cyan-bright); text-shadow: 0 0 30px rgba(6,182,212,0.4); }
.page-hero .lede { color: var(--text-2); font-size: 1.05rem; max-width: 620px; }

/* ---------- 作品页筛选 ---------- */
.works-tabs { display: flex; justify-content: center; gap: 0.7rem; flex-wrap: wrap; margin: 2.2rem 0 2.6rem; }
.works-tab {
  padding: 0.5rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 0.9rem; letter-spacing: 0.15em;
  color: var(--text-2);
  background: var(--bg-3);
  border: 1px solid rgba(6, 182, 212, 0.18);
  border-radius: var(--pill);
  transition: all var(--base) var(--ease-out);
}
.works-tab:hover { color: var(--cyan-bright); border-color: var(--cyan); }
.works-tab.active {
  background: var(--gradient-ai);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.35);
}
.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }
.work-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all var(--base) var(--ease-out);
}
.work-card:hover { transform: translateY(-6px); border-color: var(--glass-border-hover); box-shadow: var(--glass-shadow-hover); }
.work-thumb { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #000; }
.work-thumb video { width: 100%; height: 100%; object-fit: cover; }
.work-card.playing .vc-play { opacity: 0; }
.work-card .vc-play { transition: opacity var(--base) var(--ease-out); }
.work-body { padding: 1.05rem 1.15rem 1.15rem; }
.work-body h3 { font-size: 1.05rem; margin-bottom: 0.35rem; }
.work-body p { font-size: 0.82rem; color: var(--text-2); margin-bottom: 0.7rem; line-height: 1.6; }
.work-meta { display: flex; justify-content: space-between; align-items: center; font-size: 0.78rem; color: var(--muted); }
.work-author { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--text-2); }
.work-avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--gradient-ai);
  color: #06121F;
  font-size: 0.68rem; font-weight: 700;
}
.audio-card .work-thumb { display: flex; align-items: center; justify-content: center; background: radial-gradient(circle at 50% 40%, rgba(6,182,212,0.2), var(--bg-3) 70%); }
.audio-disc {
  width: 84px; height: 84px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, var(--cyan-bright) 0 12%, var(--bg) 12% 15%, transparent 15%),
    repeating-radial-gradient(circle at center, #1A2336 0 3px, #141B2C 3px 6px);
  border: 2px solid rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.25);
  animation: spin 9s linear infinite;
  animation-play-state: paused;
}
.audio-card.playing .audio-disc { animation-play-state: running; }
@keyframes spin { to { transform: rotate(360deg); } }
.audio-ctrl { width: 100%; margin-top: 0.6rem; }
.audio-ctrl audio { width: 100%; height: 34px; }
.audio-ctrl audio::-webkit-media-controls-panel { background: var(--bg-3); }

/* ---------- 课程页 ---------- */
.course-detail {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.1rem;
  margin-bottom: 1.4rem;
  transition: all var(--base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.course-detail:hover { border-color: var(--glass-border-hover); box-shadow: var(--glass-shadow-hover); }
.course-detail .cd-icon {
  width: 58px; height: 58px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--cyan-bright);
  font-family: var(--font-kai);
  font-size: 1.5rem; font-weight: 700;
  margin-bottom: 1rem;
}
.course-detail h3 { font-size: 1.45rem; display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; }
.cd-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.45rem 1.6rem; margin: 0.9rem 0 0; }
.cd-points li {
  list-style: none;
  font-size: 0.86rem; color: var(--text-2);
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.6;
}
.cd-points li::before {
  content: "";
  position: absolute; left: 0; top: 0.55em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.6);
}
.cd-side { display: flex; flex-direction: column; align-items: stretch; gap: 0.7rem; min-width: 220px; padding-top: 0.4rem; }
.cd-aud { font-size: 0.78rem; color: var(--muted); text-align: center; margin-bottom: 0.2rem; }
.cd-aud b { color: var(--gold-light); }

/* ---------- 咨询页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2.2rem; align-items: start; }
.contact-form-card {
  background: linear-gradient(160deg, rgba(20, 27, 44, 0.9), rgba(15, 21, 34, 0.95));
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-radius: var(--radius-lg);
  padding: 2.2rem 2.1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  position: relative;
  overflow: hidden;
}
.contact-form-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--cyan));
}
.contact-form-card h2 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.contact-form-card > p { font-size: 0.88rem; color: var(--text-2); margin-bottom: 1.6rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.info-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.7rem;
  display: grid;
  gap: 1.4rem;
}
.info-card h3 { font-size: 1.15rem; margin: 0; color: var(--cyan-bright); letter-spacing: 0.1em; }
.info-qr { display: flex; flex-direction: column; align-items: flex-start; gap: 1rem; }
/* 老师微信二维码：等宽两列（刘老师无微信，仅辛/黄两位） */
.info-qr .qr-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; width: 100%; max-width: 272px; align-items: start; }
.info-qr .qr-box { width: 100%; text-align: center; }
/* 两张二维码原图宽高比不同（辛 503×515 / 黄 564×542），锁成正方形容器避免两卡顶部错位 */
.info-qr .qr-box img { width: 100%; aspect-ratio: 1 / 1; object-fit: contain; }
.qr-name { display: block; margin-top: 6px; font-size: 0.74rem; font-weight: 600; color: #334155; }
.map-tip {
  font-size: 0.8rem; color: var(--muted);
  border-top: 1px dashed var(--border);
  padding-top: 1rem;
  line-height: 1.7;
}

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 0.8rem; }
.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--base) var(--ease-out);
}
.faq-item.open { border-color: rgba(6, 182, 212, 0.4); }
.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.1rem 1.3rem;
  font-family: var(--font-serif);
  font-size: 1rem; font-weight: 600;
  color: var(--text);
  text-align: left;
}
.faq-q .fi {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(34, 211, 238, 0.5);
  color: var(--cyan-bright);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: all var(--base) var(--ease-out);
}
.faq-item.open .fi { transform: rotate(45deg); background: rgba(6, 182, 212, 0.2); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--base) var(--ease-out);
}
.faq-a p { padding: 0 1.3rem 1.2rem; margin: 0; font-size: 0.88rem; color: var(--text-2); line-height: 1.8; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out); }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .nav-menu { gap: 1rem; }
  .brand-en { display: none; }
}
@media (max-width: 1024px) {
  .nav-menu {
    position: fixed;
    top: 0; right: -320px;
    width: 300px; height: 100vh;
    background: rgba(13, 18, 30, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 1.3rem;
    transition: right var(--base) var(--ease-out);
    z-index: 895;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
  }
  .nav-menu.open { right: 0; }
  .nav-toggle { display: block; z-index: 896; }
  .hero-inner { grid-template-columns: 1fr; gap: 2.2rem; }
  .quick-consult { max-width: 560px; }
  .video-wall { grid-template-columns: 1fr 1fr; }
  .video-card.featured { grid-column: span 2; grid-row: auto; min-height: 300px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  /* 触屏 / 窄屏无 hover，师资简介默认展开，否则内容永远看不到 */
  .team-bio { max-height: none; opacity: 1; margin-top: 0.4rem; }
  .team-photo::after { background: linear-gradient(180deg, transparent 30%, rgba(11, 15, 25, 0.95) 100%); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: repeat(4, 1fr); row-gap: 1.6rem; }
  .flow-step:nth-child(4) .flow-num::after { display: none; }
  .consult-grid, .contact-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .dock { display: none; }
}
@media (max-width: 640px) {
  .stats-strip { grid-template-columns: repeat(2, 1fr); row-gap: 1.2rem; }
  .stat:nth-child(3)::before { display: none; }
  .video-wall { grid-template-columns: 1fr; }
  .video-card.featured { grid-column: auto; }
  .team-grid, .adv-grid, .works-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .flow-step .flow-num::after { display: none !important; }
  .form-row { grid-template-columns: 1fr; }
  .cd-points { grid-template-columns: 1fr; }
  .course-detail { grid-template-columns: 1fr; padding: 1.6rem 1.3rem; }
  .cd-side { min-width: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 6rem; }
  .hero-title { font-size: 2rem; }
  .consult-band::after { font-size: 14rem; }
}

/* ============================================================
   单页版：锚点导航（点击导航平滑滚动到对应区块）
   ============================================================ */
section[id],
.hero[id] {
  scroll-margin-top: 86px;   /* 顶部固定导航高度补偿 */
}

/* 当前所在区块的导航高亮 */
.nav-menu .nav-link.active {
  color: var(--cyan-bright);
}

/* ---------- 提交成功后的「再填一份」按钮 ----------
   之前没有样式定义，深色底上会显示浏览器默认链接色，与整体风格不符 */
.qc-again {
  display: inline-flex; align-items: center; justify-content: center;
  margin-top: 1.1rem;
  font-family: var(--font-sans);
  font-size: 0.85rem; letter-spacing: 0.06em;
  color: var(--cyan-bright);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: var(--pill);
  padding: 0.5rem 1.4rem;
  cursor: pointer;
  transition: all var(--base) var(--ease-out);
}
.qc-again:hover { background: var(--cyan); color: #06121F; border-color: transparent; }

/* ---------- 页脚法务条目 ----------
   相关页面尚未上线，先以纯文本展示，避免 href="#" 点击跳回页顶 */
.footer-doc { color: inherit; }

/* 课程卡「咨询该课程」按钮 */
.js-ask-course { cursor: pointer; }

@media (max-width: 640px) {
  section[id] { scroll-margin-top: 74px; }

  /* 装饰性英文小标题在窄屏收窄，避免横向溢出 */
  .section-head .eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    padding: 0 1.1rem;
  }
  .section-head .eyebrow::before,
  .section-head .eyebrow::after { width: 16px; }

  /* 首屏咨询卡的水印字缩小，避免右侧溢出 */
  .quick-consult::after { right: 0; font-size: 4.5rem; }

  /* 联系区老师二维码在窄屏收紧间距 */
  .info-qr .qr-row { gap: 0.5rem; }

  /* 首屏资质徽章收窄：保证「人工智能训练师 · 正规办学资质 + 官方资质」单行不折行 */
  .hero-eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 6px 0.85rem;
    gap: 0.5rem;
    margin-bottom: 1.1rem;
  }
  .hero-eyebrow::before { width: 7px; height: 7px; }
  .hero-eyebrow::after {
    font-size: 0.58rem;
    letter-spacing: 0.1em;
    padding: 2px 8px;
  }

  /* 回到顶部按钮缩小并贴近边角，减少遮挡正文 */
  .to-top { width: 44px; height: 44px; right: 1rem; bottom: 1.1rem; font-size: 1rem; }

  /* 双保险：防止任何绝对定位装饰元素撑出横向滚动 */
  body { overflow-x: hidden; }
}