:root{
    --main: #38bdf8;
    --accent: #a78bfa;
    --bg: #0f172a;
    --text: #e2e8f0;
    --card-bg: rgba(30, 41, 59, 0.6);
    --radius-lg: 24px;
    --radius-md: 18px;
    --shadow-soft: 0 20px 40px -12px rgba(0,0,0,0.6), 0 8px 24px -6px rgba(56, 189, 248, 0.12);
  }

  * { box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
  }

  /* 渐变光晕背景 */
  body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle at center, rgba(167,139,250,0.15), transparent 70%);
    filter: blur(60px);
    z-index: -2;
    pointer-events: none;
  }
  body::after {
    content: '';
    position: fixed;
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle at center, rgba(56,189,248,0.12), transparent 70%);
    filter: blur(70px);
    z-index: -2;
    pointer-events: none;
  }

  h1,h2,h3,h4,.display-font {
    font-family: 'Inter', cursive;
    font-weight: 800;
    letter-spacing: -0.02em;
  }
  .navbar-brand {
    font-size: 1.9rem;
    font-weight: 900;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--main), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .navbar-brand i {
    font-size: 2rem;
    background: none;
    -webkit-text-fill-color: initial;
    color: var(--accent);
    margin-right: 6px;
  }

  .nav-link{
    color: var(--text) !important;
    font-weight: 500;
    border-radius: 50px;
    padding: 0.5rem 1.1rem !important;
    transition: all 0.25s ease;
  }
  .nav-link:hover{
    background: rgba(56,189,248,0.12);
    color: var(--main) !important;
  }

  /* 通用区块 */
  section{ padding: 5rem 0; }
  .container { max-width: 1280px; }

  .hero-wrap{
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 3rem 0;
  }
  .hero-title{
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(115deg, var(--main) 0%, var(--accent) 70%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    z-index: 3;
    filter: drop-shadow(0 4px 14px rgba(56,189,248,0.2));
  }
  .hero-sub{
    font-size: 1.25rem;
    max-width: 600px;
    color: #b6c2d4;
  }
  .float-element{
    position: absolute;
    border-radius: 30px;
    background: rgba(56,189,248,0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.04);
    width: 90px; height: 90px;
    animation: floatBlob 8s infinite alternate;
  }
  .float-element.f1 { top: 15%; right: 8%; background: rgba(167,139,250,0.15); }
  .float-element.f2 { bottom: 10%; left: 5%; width: 70px; height: 70px; animation-duration: 12s; }
  .float-element.f3 { top: 30%; left: 20%; width: 50px; height: 50px; background: rgba(56,189,248,0.15); animation-duration: 10s; }
  @keyframes floatBlob {
    0% { transform: translateY(-12px) scale(1); }
    100% { transform: translateY(24px) scale(1.05); }
  }

  .btn-gradient{
    background: linear-gradient(145deg, var(--main), var(--accent));
    border: none;
    border-radius: 60px;
    padding: 0.9rem 2rem;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 12px 30px -8px rgba(167,139,250,0.5);
    transition: 0.2s;
  }
  .btn-gradient:hover{
    transform: translateY(-3px);
    box-shadow: 0 18px 35px -8px rgba(56,189,248,0.5);
    color: white;
  }

  .step-card{
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    padding: 2rem 1.8rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.04);
    transition: 0.2s;
    height: 100%;
  }
  .step-number{
    font-size: 3.8rem;
    font-weight: 900;
    background: linear-gradient(145deg, var(--main), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.5rem;
  }
  .card-grid-item{
    background: rgba(30,41,59,0.5);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    padding: 1.8rem 1.2rem;
    border: 1px solid rgba(255,255,255,0.03);
    transition: all 0.25s;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.2, 0.9, 0.3, 1), transform 0.6s ease;
    box-shadow: 0 10px 30px -12px rgba(0,0,0,0.5);
  }
  .card-grid-item.show{
    opacity: 1;
    transform: translateY(0);
  }
  .card-grid-item i{
    font-size: 2.4rem;
    background: linear-gradient(145deg, var(--main), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
  }

  .long-text {
    background: rgba(15, 23, 42, 0.7);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    border-left: 4px solid var(--accent);
    backdrop-filter: blur(4px);
    box-shadow: var(--shadow-soft);
    font-size: 1.05rem;
  }

  .faq-item{
    background: rgba(30,41,59,0.3);
    border-radius: var(--radius-md);
    padding: 1.4rem 1.8rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.04);
  }

  .footer-area{
    background: rgba(2,6,23,0.6);
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 3rem 0 2rem;
  }

  .friend-links a{
    color: var(--text);
    text-decoration: none;
    margin-right: 2rem;
    opacity: 0.7;
    transition: 0.2s;
  }
  .friend-links a:hover{ opacity: 1; color: var(--main); }

  /* 数字滚动动效 */
  .count-num{
    font-size: 3rem;
    font-weight: 800;
    color: var(--main);
  }
  .stat-wrap{
    display: flex;
    gap: 2.5rem;
    flex-wrap: wrap;
  }

  /* hover海报播放按钮 */
  .poster-hover{
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: #1a2536;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    border: 1px solid rgba(255,255,255,0.06);
  }
  .poster-hover i{
    font-size: 4rem;
    color: rgba(255,255,255,0.9);
    opacity: 0;
    transform: scale(0.8);
    transition: 0.3s;
    text-shadow: 0 8px 20px rgba(0,0,0,0.4);
  }
  .poster-hover:hover i{
    opacity: 1;
    transform: scale(1);
  }

  @media (max-width: 768px) {
    .hero-title{ font-size: 3.6rem; }
    .navbar-collapse{ background: rgba(15,23,42,0.95); border-radius: 16px; padding: 1rem; }
  }

/* --- 子页面追加 --- */
/* 本页专属微调样式 */
        .about-hero { padding: 100px 0 60px; position: relative; }
.about-hero .hero-title { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.about-hero .hero-sub { font-size: clamp(1rem, 2vw, 1.2rem); max-width: 680px; margin: 0 auto; opacity: 0.85; }
.about-section { padding: 70px 0; }
.about-section h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 24px; color: var(--main); }
.about-section h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 12px; }
.about-text { line-height: 1.8; font-size: 1rem; opacity: 0.9; }
.about-text p { margin-bottom: 16px; }
.about-card { background: var(--card-bg); border-radius: var(--radius-md); padding: 28px; height: 100%; transition: transform 0.3s ease, box-shadow 0.3s ease; border: 1px solid rgba(255,255,255,0.05); }
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.about-card .icon-wrap { font-size: 2rem; color: var(--main); margin-bottom: 16px; }
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--main), var(--accent)); }
.timeline-item { position: relative; margin-bottom: 30px; }
.timeline-item::before { content: ''; position: absolute; left: -26px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--main); box-shadow: 0 0 0 4px rgba(56,189,248,0.2); }
.timeline-item .date { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-bottom: 4px; }
.timeline-item .title { font-weight: 700; font-size: 1.1rem; margin-bottom: 6px; }
.timeline-item .desc { font-size: 0.95rem; opacity: 0.85; }
.value-list { list-style: none; padding: 0; }
.value-list li { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.06); display: flex; align-items: flex-start; gap: 12px; }
.value-list li:last-child { border-bottom: none; }
.value-list .fa-solid { color: var(--main); margin-top: 4px; }
.stat-box { text-align: center; padding: 30px 16px; background: var(--card-bg); border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.05); }
.stat-box .count-num { font-size: 2.2rem; font-weight: 800; color: var(--main); }
.stat-box .stat-label { font-size: 0.9rem; opacity: 0.8; margin-top: 6px; }
.today-update { background: rgba(56,189,248,0.08); border-radius: var(--radius-lg); padding: 30px; margin-top: 40px; border: 1px solid rgba(56,189,248,0.15); }
.today-update h3 { color: var(--main); }
.today-update ul { list-style: none; padding: 0; margin: 16px 0 0; }
.today-update li { padding: 8px 0; display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
.today-update li .fa-solid { color: var(--accent); font-size: 0.85rem; }
.footer-link-inline { color: var(--text); opacity: 0.7; text-decoration: none; transition: opacity 0.2s; }
.footer-link-inline:hover { opacity: 1; color: var(--main); }
.footer-area a { color: var(--text); opacity: 0.7; text-decoration: none; margin-right: 24px; transition: opacity 0.2s; }
.footer-area a:hover { opacity: 1; color: var(--main); }
.about-hero { padding: 80px 0 40px; }
.about-section { padding: 50px 0; }
.timeline { padding-left: 24px; }

/* --- 子页面追加 --- */
.privacy-section {
            padding: 60px 0;
        }
.privacy-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 36px;
            margin-bottom: 24px;
            border: 1px solid rgba(255,255,255,0.06);
            box-shadow: var(--shadow-soft);
        }
.privacy-card h2 {
            color: var(--main);
            font-weight: 800;
            margin-bottom: 16px;
            font-size: 1.6rem;
        }
.privacy-card p, .privacy-card li {
            color: var(--text);
            line-height: 1.8;
            opacity: 0.92;
        }
.privacy-card ul {
            padding-left: 20px;
            margin-top: 12px;
        }
.privacy-card li {
            margin-bottom: 8px;
        }
.privacy-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-right: 12px;
            vertical-align: middle;
        }
.privacy-highlight {
            background: rgba(56, 189, 248, 0.08);
            border-left: 4px solid var(--main);
            padding: 16px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 20px 0;
        }
.privacy-highlight p {
            margin: 0;
            font-size: 0.95rem;
        }
.privacy-badge {
            display: inline-block;
            background: rgba(167, 139, 250, 0.15);
            color: var(--accent);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
.privacy-note {
            font-size: 0.85rem;
            opacity: 0.7;
            margin-top: 8px;
        }