/* ============================================================
   满分驾校 - 设计系统 v2
   科技感：深蓝底 + 霓虹蓝/青线条 + 网格动效
   品牌：深路蓝 #0A2E6E × 霓虹青 #00D4FF × 道路黄 #F5B301
   ============================================================ */

/* ---- 变量 ---- */
:root {
  --blue-deep: #0A2E6E;
  --blue-mid:  #0F4CA8;
  --blue-neon: #00D4FF;
  --blue-glow: rgba(0, 212, 255, 0.18);
  --yellow:    #F5B301;
  --yellow-light: #FFD466;
  --dark-1:    #061B44;
  --dark-2:    #0D2347;
  --dark-3:    #112D5A;
  --white:     #FFFFFF;
  --offwhite:  #E8F4FF;
  --gray-1:    #8FBCD9;
  --gray-2:    #4A7BA8;
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 22px;
  --shadow:    0 4px 24px rgba(0,0,0,0.22);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.32);
  --font:      'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ---- 重置 & 基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--dark-1);
  color: var(--offwhite);
  line-height: 1.65;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--dark-1); }
::-webkit-scrollbar-thumb { background: var(--blue-mid); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--blue-neon); }

/* ---- 容器 ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 动效 ---- */
@keyframes gridDrift {
  0%   { transform: translateY(0); }
  100% { transform: translateY(40px); }
}
@keyframes pulse-ring {
  0%   { opacity: 0.7; transform: scale(0.92); }
  50%  { opacity: 0.3; transform: scale(1.04); }
  100% { opacity: 0.7; transform: scale(0.92); }
}
@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- 滚动入场 ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 11px 26px; border-radius: var(--radius);
  font-weight: 600; font-size: 1rem; cursor: pointer; border: none;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--yellow); color: var(--dark-1);
  box-shadow: 0 0 20px rgba(245,179,1,0.35);
}
.btn-primary:hover { background: var(--yellow-light); box-shadow: 0 0 32px rgba(245,179,1,0.55); }
.btn-ghost {
  background: transparent; color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-ghost:hover { border-color: var(--blue-neon); color: var(--blue-neon); background: var(--blue-glow); }
.btn-lg { padding: 14px 34px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 68px;
  background: rgba(6, 27, 68, 0.82);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid rgba(0,212,255,0.12);
}
.nav-inner {
  display: flex; align-items: center; height: 68px; gap: 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; color: var(--white);
  flex-shrink: 0; margin-right: 32px;
}
.brand-mark { color: var(--blue-neon); }
.brand-text { letter-spacing: 0.02em; }
.nav-links {
  display: flex; align-items: center; gap: 6px;
  margin-left: auto;
}
.nav-links a {
  padding: 7px 14px; border-radius: var(--radius-sm);
  font-size: 0.92rem; color: var(--gray-1); font-weight: 500;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--blue-neon); background: var(--blue-glow); }
.nav-cta { margin-left: 20px; padding: 9px 20px; font-size: 0.92rem; }

/* ============================================================
   HERO
   科技感 = 深色渐变 + 网格 + 霓虹蓝高光
   ============================================================ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding-top: 68px; overflow: hidden;
  /* 深蓝底 + 斜向渐变 */
  background:
    radial-gradient(ellipse 80% 60% at 65% 40%, rgba(15,76,168,0.55) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(0,212,255,0.08) 0%, transparent 60%),
    linear-gradient(160deg, #061B44 0%, #0D2347 50%, #061B44 100%);
}

/* 背景科技网格 */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  animation: gridDrift 18s linear infinite;
  pointer-events: none;
}
/* 底部道路渐隐 */
.hero::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 200px;
  background: linear-gradient(to top, var(--dark-1), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
  padding-top: 60px; padding-bottom: 80px;
}

/* 霓虹光晕装饰 */
.hero-glow {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.25) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse-ring 4s ease-in-out infinite;
}
.hero-glow-1 { width: 400px; height: 400px; top: -80px; right: -60px; animation-delay: 0s; }
.hero-glow-2 { width: 250px; height: 250px; bottom: 20px; left: 30%; animation-delay: 1.5s; background: radial-gradient(circle, rgba(245,179,1,0.15) 0%, transparent 70%); }

/* 左侧文字 */
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--blue-neon);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 5px 14px; border-radius: 100px;
  margin-bottom: 22px;
}
.hero-eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-neon); box-shadow: 0 0 8px var(--blue-neon);
  animation: pulse-ring 2s ease-in-out infinite;
}
.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 900; line-height: 1.18;
  color: var(--white); margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.hl {
  background: linear-gradient(90deg, var(--blue-neon), var(--yellow));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.1rem; color: var(--gray-1);
  margin-bottom: 32px; max-width: 480px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-badges {
  display: flex; flex-wrap: wrap; gap: 10px;
}
.hero-badges li {
  font-size: 0.83rem; font-weight: 500;
  color: var(--gray-1); padding: 4px 12px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 100px;
  background: rgba(255,255,255,0.04);
  display: flex; align-items: center; gap: 5px;
}
.hero-badges .tick { color: var(--yellow); font-weight: 700; }
.hero-badges .dot { color: var(--blue-neon); font-size: 1rem; }


/* 右侧媒体 */
.hero-media { position: relative; }
.hero-img-wrap {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.15);
}
.hero-img-wrap img {
  width: 100%; height: auto; display: block;
  object-fit: cover;
}
/* 科技边框光效 */
.hero-img-wrap::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(0,212,255,0.3);
  pointer-events: none;
}

.hero-card {
  position: absolute; bottom: 20px; left: 20px;
  background: rgba(6,27,68,0.88);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: var(--radius);
  padding: 14px 20px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.hero-card-num {
  font-size: 2.8rem; font-weight: 900; color: var(--blue-neon);
  line-height: 1; text-shadow: 0 0 20px rgba(0,212,255,0.6);
}
.hero-card-label { font-size: 0.85rem; color: var(--gray-1); line-height: 1.5; }

/* 底部道路线装饰 */
.roadline {
  position: absolute; bottom: 0; left: 0; right: 0; height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--yellow) 0, var(--yellow) 32px,
    transparent 32px, transparent 56px
  );
  opacity: 0.7;
}

/* ============================================================
   STATS
   ============================================================ */
.stats {
  position: relative; z-index: 2;
  background: var(--dark-2);
  border-top: 1px solid rgba(0,212,255,0.1);
  border-bottom: 1px solid rgba(0,212,255,0.1);
  padding: 28px 0;
}
.stats::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.stats-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; divide-x: 1px solid rgba(255,255,255,0.06);
}
.stat {
  text-align: center; padding: 18px 16px;
  border-right: 1px solid rgba(255,255,255,0.06);
}
.stat:last-child { border-right: none; }
.stat-num {
  display: block; font-size: 2.4rem; font-weight: 900; color: var(--blue-neon);
  line-height: 1; text-shadow: 0 0 24px rgba(0,212,255,0.5);
  animation: countUp 0.6s ease both;
}
.stat-unit { font-size: 1.1rem; font-weight: 500; color: var(--gray-1); margin-left: 2px; }
.stat-label { display: block; margin-top: 6px; font-size: 0.82rem; color: var(--gray-2); font-weight: 500; letter-spacing: 0.04em; }

/* ============================================================
   SECTIONS 通用
   ============================================================ */
.section { padding: 96px 0; }
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800;
  color: var(--white); margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-intro {
  font-size: 1.05rem; color: var(--gray-1); margin-bottom: 52px;
}

/* ---- WHY SECTION (科技展示) ---- */
.why { background: var(--dark-1); }
.why-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 18px;
}
.why-card {
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.why-card:hover {
  border-color: rgba(0,212,255,0.35);
  box-shadow: 0 0 28px rgba(0,212,255,0.08);
  transform: translateY(-3px);
}
.why-card > img {
  width: 100%; height: 220px; object-fit: cover;
}
.why-card-body { padding: 22px 24px; }
.why-card-body h3 {
  font-size: 1.05rem; font-weight: 700; color: var(--white);
  margin-bottom: 8px;
}
.why-card-body p { font-size: 0.9rem; color: var(--gray-1); line-height: 1.65; }
.why-card-lg { grid-row: span 2; }
.why-card-lg > img { height: 100%; min-height: 300px; }
.why-card-lg .why-card-body { padding: 26px 28px; }
.why-card-lg .why-card-body h3 { font-size: 1.2rem; }
.why-card-accent {
  background: rgba(0,212,255,0.07);
  border-color: rgba(0,212,255,0.2);
}

/* ---- COURSES ---- */
.courses { background: var(--dark-2); }
.courses-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.course-card {
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex; flex-direction: column; gap: 14px;
  transition: border-color 0.2s, transform 0.2s;
}
.course-card:hover { border-color: rgba(0,212,255,0.3); transform: translateY(-3px); }
.course-card-main {
  background: linear-gradient(145deg, rgba(15,76,168,0.5), rgba(10,46,110,0.6));
  border-color: rgba(0,212,255,0.25);
  box-shadow: 0 0 40px rgba(0,212,255,0.06);
}
.course-tag {
  display: inline-block; width: fit-content;
  background: var(--yellow); color: var(--dark-1);
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; padding: 3px 10px; border-radius: 100px;
}
.course-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--white); }
.course-desc { font-size: 0.88rem; color: var(--gray-1); flex: 1; }
.course-list { display: flex; flex-direction: column; gap: 7px; }
.course-list li {
  font-size: 0.85rem; color: var(--gray-1);
  padding-left: 18px; position: relative;
}
.course-list li::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-neon); box-shadow: 0 0 6px var(--blue-neon);
}
.course-card .btn { margin-top: auto; }

/* ---- 为什么卡片标题 ✓ 图标 ---- */
.why-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--yellow);
  color: var(--dark-1);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 900;
  margin-right: 8px;
  flex-shrink: 0;
  vertical-align: middle;
}

/* ---- GROUNDS (场地画廊) ---- */
.grounds { background: var(--dark-1); padding: 80px 0; }
.grounds-head { text-align: center; margin-bottom: 48px; }
.grounds-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 200px);
  gap: 14px;
}
.ground-card {
  position: relative; border-radius: var(--radius);
  overflow: hidden; cursor: pointer;
  background: var(--dark-3);
}
.ground-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease, filter 0.3s;
  filter: brightness(0.75) saturate(0.9);
}
.ground-card:hover img { transform: scale(1.06); filter: brightness(0.9) saturate(1.1); }
.ground-card-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 10px 14px;
  background: linear-gradient(to top, rgba(6,27,68,0.9), transparent);
  display: flex; flex-direction: column;
}
.ground-name { font-size: 0.88rem; font-weight: 700; color: var(--white); }
.ground-note { font-size: 0.75rem; color: var(--gray-1); }
.grounds-badge {
  text-align: center; margin-top: 24px;
  font-size: 0.82rem; color: var(--gray-2);
  background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.12);
  padding: 6px 18px; border-radius: 100px; display: inline-block;
}

/* ---- VOICES (真实好评) ---- */
.voices { background: var(--dark-2); }
.voices-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  max-height: 600px;
  overflow-y: auto;
  padding: 4px;
}
.voice-card {
  flex: 0 0 calc(33.333% - 10px);
  break-inside: avoid;
  background: rgba(13,35,71,0.55);
  border: 1px solid rgba(0,212,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.voice-card:hover { border-color: rgba(0,212,255,0.25); transform: translateY(-3px); }
.voice-card img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- FAQ ---- */
.faq { background: var(--dark-1); }
.faq-container { max-width: 760px; margin: 0 auto; }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: rgba(13,35,71,0.5);
  border: 1px solid rgba(0,212,255,0.1);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item[open] { border-color: rgba(0,212,255,0.3); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; font-weight: 600; font-size: 0.97rem;
  color: var(--offwhite); cursor: pointer; list-style: none;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 1.2rem; color: var(--blue-neon);
  font-weight: 300; flex-shrink: 0;
  transition: transform 0.25s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding: 0 22px 18px; font-size: 0.9rem; color: var(--gray-1); line-height: 1.7;
  animation: slideDown 0.22s ease;
}

/* ---- APPLY ---- */
.apply {
  background: var(--dark-2);
  position: relative; overflow: hidden;
}
.apply::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}
.apply-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}
.apply-title {
  font-size: clamp(1.7rem, 2.8vw, 2.3rem); font-weight: 800;
  color: var(--white); line-height: 1.25; margin-bottom: 16px;
}
.apply-sub { font-size: 0.97rem; color: var(--gray-1); margin-bottom: 24px; }
.apply-points { display: flex; flex-direction: column; gap: 10px; }
.apply-points li {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.92rem; color: var(--offwhite);
}
.apply-points li::before {
  content: ''; width: 20px; height: 20px; border-radius: 50%;
  background: rgba(0,212,255,0.15); border: 1px solid rgba(0,212,255,0.35);
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300D4FF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
}

/* ---- 表单 ---- */
.apply-form {
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex; flex-direction: column; gap: 18px;
}
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field label { font-size: 0.85rem; font-weight: 600; color: var(--gray-1); letter-spacing: 0.03em; }
.form-field input,
.form-field select {
  background: rgba(6,27,68,0.7);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.95rem; color: var(--offwhite);
  font-family: var(--font);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}
.form-field input::placeholder { color: var(--gray-2); }
.form-field input:focus,
.form-field select:focus {
  border-color: var(--blue-neon);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.12);
}
.form-field input[aria-invalid="true"] { border-color: #ff6b6b; }
.form-error {
  display: none; font-size: 0.8rem; color: #ff8080;
  margin-top: 2px;
}
.form-error.show { display: block; }
.form-note {
  font-size: 0.77rem; color: var(--gray-2); text-align: center;
  margin-top: -6px;
}
.form-success {
  display: none;
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: var(--radius-lg);
  padding: 36px 28px; text-align: center;
}
.form-success.show { display: block; }
.form-success-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(0,212,255,0.15); border: 2px solid var(--blue-neon);
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300D4FF' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 26px; background-repeat: no-repeat; background-position: center;
}
.form-success h3 { font-size: 1.15rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.form-success p { font-size: 0.9rem; color: var(--gray-1); }

/* ---- FOOTER ---- */
.site-footer {
  background: var(--dark-1);
  border-top: 1px solid rgba(0,212,255,0.08);
  padding: 40px 0 28px;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.footer-brand .brand-text { font-size: 1.1rem; font-weight: 700; color: var(--white); }
.footer-brand p { font-size: 0.85rem; color: var(--gray-2); margin-top: 4px; }
.footer-contact { font-size: 0.85rem; color: var(--gray-2); }
.footer-contact p { margin-bottom: 4px; }
.footer-note { font-size: 0.77rem; color: var(--gray-2); margin-top: 4px; }

/* ---- Hero 背景图（素材） ---- */
.hero { overflow: hidden; }
.hero-bg-img {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;           /* 填满整个区域，不留边栏 */
  object-position: center center;
  filter: brightness(0.35) saturate(0.6);  /* 压暗图片，突出文字 */
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(ellipse 80% 80% at 50% 50%, transparent 30%, rgba(6,27,68,0.7) 100%),
    linear-gradient(to bottom, rgba(6,27,68,0.3) 0%, rgba(6,27,68,0.1) 50%, rgba(6,27,68,0.6) 100%);
}
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  animation: gridDrift 18s linear infinite;
}
.hero-inner { z-index: 2; position: relative; }

/* 科技光晕装饰 */
.hero-glow {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.22) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse-ring 4s ease-in-out infinite;
  z-index: 1;
}
.hero-glow-1 { width: 420px; height: 420px; top: -100px; right: 5%; animation-delay: 0s; }
.hero-glow-2 { width: 280px; height: 280px; bottom: 5%; left: 5%; animation-delay: 2s; background: radial-gradient(circle, rgba(245,179,1,0.15) 0%, transparent 70%); }

/* ---- 尾图横幅 ---- */
.footer-banner {
  width: 100%;
  max-height: 480px;
  overflow: hidden;
  background: #061B44;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-banner img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  display: block;
}

/* ---- 场地 carousel（全宽左右滑动） ---- */
.campus-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--dark-2);
}

.campus-track {
  display: flex;
  transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.campus-slide {
  flex: 0 0 100%;
  width: 100%;
  aspect-ratio: 16 / 9;   /* 固定16:9，防止图片拉伸变形 */
  position: relative;
  overflow: hidden;
  background: #061B44;
}

.campus-img-wrap {
  width: 100%;
  height: 100%;
}

.campus-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;          /* 16:9区域填满，不变形 */
  object-position: center;
  display: block;
}

.campus-slide-info {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  pointer-events: none;
  white-space: nowrap;
}

/* 箭头按钮 */
.campus-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(10, 46, 110, 0.85);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--blue-neon);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  backdrop-filter: blur(4px);
}
.campus-btn:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--blue-neon);
  transform: translateY(-50%) scale(1.08);
}
.campus-btn:active { transform: translateY(-50%) scale(0.95); }
.campus-btn-prev { left: 20px; }
.campus-btn-next { right: 20px; }

/* Dot 指示器 */
.campus-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 14px 0 6px;
  flex-wrap: wrap;
}

.campus-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, width 0.25s;
  padding: 0;
}
.campus-dot.active {
  background: var(--blue-neon);
  transform: scale(1.3);
  width: 20px;
  border-radius: 4px;
}

/* ---- 好评截图卡片 ---- */
.voice-card-img {
  background: transparent; border: none; padding: 0;
  border-radius: var(--radius-lg); overflow: hidden;
}
.voice-card-img img {
  width: 100%; height: auto; border-radius: var(--radius-lg);
  display: block; object-fit: cover;
  transition: transform 0.35s ease, filter 0.3s;
  filter: brightness(0.9) saturate(0.95);
}
.voice-card-img:hover img { transform: scale(1.03); filter: brightness(1) saturate(1.05); }

/* ---- 场地宽卡 ---- */
.ground-card-wide { grid-column: span 2; }

/* ---- 抖音区块 ---- */
.douyin { background: var(--dark-2); }
.douyin-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; align-items: start;
}

/* 视频预览卡片 */
.douyin-video-card {
  display: block; border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.12);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.douyin-video-card:hover {
  border-color: rgba(0,212,255,0.35);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.3);
}
.douyin-bg-img.dv-thumb {
  background-image: url('images/materials/变道秘籍.jpg');
  background-size: cover;
  background-position: center;
}
.dv-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9; background: var(--dark-3);
}
.dv-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.3s;
}
.douyin-bg-card {
  background-image: url('images/materials/金校长界面.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}
.douyin-bg-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(6,27,68,0.85) 0%, rgba(6,27,68,0.5) 100%);
  border-radius: inherit;
  z-index: 0;
}
.douyin-bg-card > * { position: relative; z-index: 1; }

.douyin-video-card:hover .dv-thumb img { transform: scale(1.04); }
.dv-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.35);
  transition: background 0.2s;
}
.douyin-video-card:hover .dv-play-btn { background: rgba(0,0,0,0.5); }
.dv-play-btn svg {
  width: 56px; height: 56px;
  background: rgba(0,0,0,0.5);
  border-radius: 50%;
  padding: 14px;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.3);
  transition: transform 0.2s;
}
.douyin-video-card:hover .dv-play-btn svg { transform: scale(1.1); }
.dv-duration {
  position: absolute; bottom: 10px; right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff; font-size: 0.78rem; font-weight: 600;
  padding: 2px 8px; border-radius: 4px;
}
.dv-info { padding: 16px 18px; }
.dv-title { font-size: 0.95rem; font-weight: 600; color: var(--offwhite); margin-bottom: 6px; }
.dv-meta { font-size: 0.8rem; color: var(--gray-2); }

/* 抖音主页卡片 */
.douyin-profile-card {
  background: rgba(13,35,71,0.6);
  border: 1px solid rgba(0,212,255,0.12);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex; flex-direction: column; gap: 14px;
  align-items: flex-start;
}
.dp-avatar { display: flex; align-items: center; gap: 16px; }
.dp-info { display: flex; flex-direction: column; gap: 4px; }
.dp-name { font-size: 1.05rem; font-weight: 700; color: var(--white); }
.dp-id { font-size: 0.85rem; color: var(--gray-2); font-family: monospace; }
.dp-fans { font-size: 0.82rem; color: var(--gray-2); }
.dp-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.dp-badge {
  font-size: 0.75rem; font-weight: 600;
  background: rgba(0,212,255,0.1); color: var(--blue-neon);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 3px 10px; border-radius: 100px;
}
.dp-cta { width: 100%; justify-content: center; }
.dp-desc {
  font-size: 0.82rem; color: var(--gray-2);
  line-height: 1.6; border-top: 1px solid rgba(255,255,255,0.07); padding-top: 12px; width: 100%;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-media { order: -1; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .why-card-lg { grid-row: span 1; grid-column: span 2; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .apply-inner { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .why-grid { grid-template-columns: 1fr; }
  .why-card-lg { grid-column: span 1; }
  .courses-grid { grid-template-columns: 1fr; }
  .voices-grid { flex-wrap: wrap; }
  .voice-card { flex: 0 0 calc(50% - 7px); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
  .hero-title { font-size: 2rem; }
}
@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; }
}