:root {
      --gold: #f0c060;
      --gold-light: #ffe49a;
      --gold-dark: #b8860b;
      --cyan: #00e5ff;
      --cyan-dark: #0097a7;
      --purple: #7c3aed;
      --purple-light: #a78bfa;
      --red: #ff4060;
      --dark: #020510;
      --dark2: #060d1f;
      --dark3: #0a1628;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      background: var(--dark);
      color: #e0e8ff;
      font-family: 'Noto Serif SC', 'Microsoft YaHei', serif;
      overflow-x: hidden;
    }

    /* ============================================================
       LOADING SCREEN
    ============================================================ */
    #loader {
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: var(--dark);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      transition: opacity 0.8s ease, visibility 0.8s ease;
    }

    #loader.hide { opacity: 0; visibility: hidden; }

    .loader-rune {
      position: relative;
      width: 160px;
      height: 160px;
    }

    .loader-rune svg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
    }

    .rune-ring-1 { animation: spin 4s linear infinite; }
    .rune-ring-2 { animation: spin 2.5s linear infinite reverse; }
    .rune-ring-3 { animation: spin 6s linear infinite; }

    @keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

    .loader-title {
      font-size: 36px;
      font-weight: 900;
      letter-spacing: 8px;
      background: linear-gradient(135deg, var(--gold) 0%, #fff 50%, var(--gold) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      background-size: 200% 100%;
      animation: shimmer 2s ease-in-out infinite;
    }

    @keyframes shimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }

    .loader-bar-wrap {
      width: 280px;
      height: 2px;
      background: #ffffff11;
      border-radius: 2px;
      overflow: hidden;
    }

    .loader-bar {
      height: 100%;
      width: 0%;
      background: linear-gradient(90deg, var(--purple), var(--cyan), var(--gold));
      border-radius: 2px;
      transition: width 0.1s linear;
      box-shadow: 0 0 12px var(--cyan);
    }

    .loader-text {
      font-size: 11px;
      letter-spacing: 4px;
      color: #304050;
    }

    /* ============================================================
       PARTICLES
    ============================================================ */
    #particles {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
    }

    /* ============================================================
       NAVBAR
    ============================================================ */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 72px;
      height: 72px;
      background: transparent;
      border-bottom: 1px solid transparent;
      transition: all 0.4s ease;
    }

    nav.scrolled {
      background: #020510ee;
      border-bottom-color: #00e5ff1a;
      backdrop-filter: blur(16px);
      height: 60px;
      box-shadow: 0 4px 30px #00000066;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .nav-logo-emblem {
      width: 38px; height: 38px;
      flex-shrink: 0;
    }

    .nav-logo-text {
      font-size: 20px;
      font-weight: 900;
      letter-spacing: 3px;
      background: linear-gradient(135deg, var(--gold) 0%, var(--cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      gap: 40px;
      list-style: none;
    }

    .nav-links a {
      color: #7090b0;
      text-decoration: none;
      font-size: 13px;
      letter-spacing: 2px;
      transition: color 0.3s;
      position: relative;
      padding-bottom: 4px;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0; left: 50%; right: 50%;
      height: 1px;
      background: var(--cyan);
      transition: left 0.3s, right 0.3s;
    }

    .nav-links a:hover { color: #e0e8ff; }
    .nav-links a:hover::after, .nav-links a.active::after { left: 0; right: 0; }
    .nav-links a.active { color: var(--cyan); }

    .nav-cta {
      padding: 9px 28px;
      background: linear-gradient(135deg, var(--purple) 0%, #1a4a80 100%);
      border: 1px solid #00e5ff44;
      border-radius: 3px;
      color: #fff;
      font-size: 13px;
      letter-spacing: 3px;
      text-decoration: none;
      transition: all 0.3s;
      box-shadow: 0 0 20px #7c3aed44;
      font-family: 'Noto Serif SC', serif;
    }

    .nav-cta:hover {
      box-shadow: 0 0 30px #00e5ff66;
      border-color: var(--cyan);
      transform: translateY(-1px);
    }

    /* ============================================================
       HERO
    ============================================================ */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 100px 40px 60px;
      overflow: hidden;
    }

    /* Layered background */
    .hero-bg {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background:
        radial-gradient(ellipse 100% 80% at 50% 30%, #0d2a5520 0%, transparent 70%),
        radial-gradient(ellipse 50% 50% at 15% 70%, #7c3aed18 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 85% 20%, #00e5ff0d 0%, transparent 60%),
        linear-gradient(180deg, #020510 0%, #050e20 100%);
    }

    .hero-img {
      position: absolute;
      inset: 0;
      width: 100%; height: 100%;
      object-fit: cover;
      object-position: center 25%;
      opacity: 0.28;
      z-index: 0;
      pointer-events: none;
    }

    .hero-img-mask {
      position: absolute;
      inset: 0;
      z-index: 0;
      background:
        linear-gradient(180deg, #020510 0%, transparent 18%, transparent 65%, #020510 100%),
        linear-gradient(90deg, #020510 0%, #020510aa 25%, transparent 60%, #020510aa 85%, #020510 100%),
        radial-gradient(ellipse 100% 60% at 50% 50%, transparent 30%, #020510bb 100%);
      pointer-events: none;
    }

    /* Tech grid */
    .hero-grid {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(#00e5ff07 1px, transparent 1px),
        linear-gradient(90deg, #00e5ff07 1px, transparent 1px);
      background-size: 80px 80px;
      mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, black 0%, transparent 80%);
    }

    /* Magic array / 法阵 */
    .hero-array {
      position: absolute;
      width: 700px;
      height: 700px;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      pointer-events: none;
      opacity: 0.18;
    }

    .array-ring {
      position: absolute;
      inset: 0;
      border-radius: 50%;
      border: 1px solid;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .ar-1 { border-color: #f0c060; animation: spin 60s linear infinite; }
    .ar-2 { inset: 40px; border-color: #00e5ff; animation: spin 40s linear infinite reverse; }
    .ar-3 { inset: 80px; border-color: #7c3aed; animation: spin 25s linear infinite; }
    .ar-4 { inset: 120px; border-color: #f0c060; animation: spin 18s linear infinite reverse; }

    /* Light beams */
    .hero-beams {
      position: absolute;
      inset: 0;
      pointer-events: none;
      overflow: hidden;
    }

    .beam {
      position: absolute;
      top: 0;
      width: 1px;
      height: 100%;
      background: linear-gradient(180deg, transparent 0%, var(--cyan) 40%, transparent 100%);
      opacity: 0;
      animation: beamFall 6s ease-in-out infinite;
    }

    .beam:nth-child(1) { left: 20%; animation-delay: 0s; }
    .beam:nth-child(2) { left: 45%; background: linear-gradient(180deg, transparent 0%, var(--gold) 40%, transparent 100%); animation-delay: 2s; }
    .beam:nth-child(3) { left: 70%; animation-delay: 4s; }
    .beam:nth-child(4) { left: 85%; background: linear-gradient(180deg, transparent 0%, var(--purple-light) 40%, transparent 100%); animation-delay: 1s; }

    @keyframes beamFall {
      0% { opacity: 0; transform: translateY(-100%); }
      20% { opacity: 0.15; }
      80% { opacity: 0.08; }
      100% { opacity: 0; transform: translateY(100%); }
    }

    /* Clouds / 祥云 */
    .hero-clouds {
      position: absolute;
      inset: 0;
      pointer-events: none;
    }

    .cloud {
      position: absolute;
      opacity: 0.06;
      animation: cloudDrift linear infinite;
    }

    @keyframes cloudDrift {
      from { transform: translateX(-200px); }
      to { transform: translateX(calc(100vw + 200px)); }
    }

    /* Mountain silhouette */
    .hero-mountains {
      position: absolute;
      bottom: 0; left: 0; right: 0;
      height: 380px;
      pointer-events: none;
    }

    /* Floating orbs */
    .orb {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
      animation: orbPulse 8s ease-in-out infinite;
    }

    .orb-1 { width: 400px; height: 400px; background: radial-gradient(circle, #7c3aed33 0%, transparent 70%); top: 5%; left: -5%; animation-delay: 0s; }
    .orb-2 { width: 500px; height: 500px; background: radial-gradient(circle, #00e5ff1a 0%, transparent 70%); top: 0%; right: -10%; animation-delay: -3s; }
    .orb-3 { width: 300px; height: 300px; background: radial-gradient(circle, #f0c06022 0%, transparent 70%); bottom: 25%; left: 25%; animation-delay: -5s; }

    @keyframes orbPulse {
      0%, 100% { transform: scale(1) translateY(0); }
      50% { transform: scale(1.1) translateY(-20px); }
    }

    /* Content */
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 7px 22px;
      border: 1px solid #f0c06055;
      border-radius: 30px;
      background: linear-gradient(135deg, #f0c06011 0%, #7c3aed11 100%);
      font-size: 12px;
      letter-spacing: 4px;
      color: var(--gold);
      margin-bottom: 36px;
      box-shadow: 0 0 20px #f0c06022;
    }

    .badge-pulse {
      width: 6px; height: 6px;
      border-radius: 50%;
      background: var(--gold);
      box-shadow: 0 0 8px var(--gold);
      animation: blink 1.2s ease-in-out infinite;
    }

    @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }

    .hero-title {
      font-size: clamp(60px, 9vw, 110px);
      font-weight: 900;
      letter-spacing: 10px;
      line-height: 1;
      margin-bottom: 16px;
    }

    .title-main {
      display: block;
      background: linear-gradient(135deg, #fff 0%, var(--gold-light) 30%, var(--gold) 50%, #fff 70%, var(--gold-light) 100%);
      background-size: 200% 100%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      filter: drop-shadow(0 0 40px #f0c06055);
      animation: titleGlow 4s ease-in-out infinite, shimmer 5s ease-in-out infinite;
    }

    @keyframes titleGlow {
      0%,100% { filter: drop-shadow(0 0 30px #f0c06055); }
      50% { filter: drop-shadow(0 0 60px #f0c060aa); }
    }

    .title-sub {
      display: block;
      font-size: clamp(22px, 3vw, 36px);
      letter-spacing: 16px;
      background: linear-gradient(135deg, var(--cyan) 0%, var(--purple-light) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-top: 12px;
    }

    .hero-divider {
      display: flex;
      align-items: center;
      gap: 20px;
      margin: 28px 0;
      width: 480px;
    }

    .divider-line {
      flex: 1;
      height: 1px;
      background: linear-gradient(90deg, transparent, #f0c06055);
    }

    .divider-line.right { background: linear-gradient(90deg, #f0c06055, transparent); }

    .divider-diamond {
      width: 8px; height: 8px;
      background: var(--gold);
      transform: rotate(45deg);
      box-shadow: 0 0 10px var(--gold);
    }

    .hero-tags {
      display: flex;
      gap: 12px;
      margin-bottom: 48px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .htag {
      padding: 8px 22px;
      border-radius: 3px;
      font-size: 13px;
      letter-spacing: 2px;
      font-weight: 700;
      position: relative;
      overflow: hidden;
      transition: all 0.3s;
    }

    .htag::before {
      content: '';
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity 0.3s;
    }

    .htag:hover { transform: translateY(-2px); }
    .htag:hover::before { opacity: 1; }

    .htag-gold {
      border: 1px solid #f0c06055;
      color: var(--gold);
      background: #f0c06010;
    }

    .htag-gold::before { background: linear-gradient(135deg, #f0c06020, transparent); }
    .htag-gold:hover { box-shadow: 0 0 20px #f0c06033; border-color: #f0c060aa; }

    .htag-cyan {
      border: 1px solid #00e5ff44;
      color: var(--cyan);
      background: #00e5ff0d;
    }

    .htag-cyan:hover { box-shadow: 0 0 20px #00e5ff33; border-color: #00e5ffaa; }

    .htag-purple {
      border: 1px solid #7c3aed55;
      color: var(--purple-light);
      background: #7c3aed11;
    }

    .htag-purple:hover { box-shadow: 0 0 20px #7c3aed33; border-color: #a78bfaaa; }

    .hero-buttons {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 18px;
    }

    .btn-main-dl {
      padding: 20px 80px;
      font-size: 19px;
      letter-spacing: 8px;
    }

    .hero-sub-btns {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .btn-sub {
      padding: 13px 30px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 6px;
      color: #c0d0e8;
      font-size: 15px;
      font-weight: 600;
      letter-spacing: 3px;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.25s;
      backdrop-filter: blur(4px);
      font-family: 'Noto Serif SC', serif;
    }
    .btn-sub:hover {
      background: rgba(255,255,255,0.1);
      border-color: rgba(255,255,255,0.3);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(255,255,255,0.06);
    }
    .btn-sub-warn {
      border-color: rgba(255,160,60,0.35);
      color: #ffb347;
    }
    .btn-sub-warn:hover {
      border-color: rgba(255,160,60,0.7);
      color: #ffd080;
      background: rgba(255,160,60,0.1);
      box-shadow: 0 4px 20px rgba(255,160,60,0.1);
    }
    .btn-sub-cyan {
      border-color: rgba(0,229,255,0.3);
      color: #7dd3fc;
    }
    .btn-sub-cyan:hover {
      border-color: rgba(0,229,255,0.6);
      color: #a5f3fc;
      background: rgba(0,229,255,0.08);
      box-shadow: 0 4px 20px rgba(0,229,255,0.08);
    }

    .btn-gold {
      padding: 16px 56px;
      background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 50%, var(--gold-dark) 100%);
      border: none;
      border-radius: 3px;
      color: #1a0e00;
      font-size: 16px;
      font-weight: 900;
      letter-spacing: 5px;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 0 30px #f0c06055, 0 4px 20px #f0c06033, inset 0 1px 0 #ffffff44;
      transition: all 0.3s;
      font-family: 'Noto Serif SC', serif;
      position: relative;
      overflow: hidden;
    }

    .btn-gold::after {
      content: '';
      position: absolute;
      top: 0; left: -100%; width: 60%; height: 100%;
      background: linear-gradient(90deg, transparent, #ffffff55, transparent);
      transform: skewX(-20deg);
      transition: left 0.6s;
    }

    .btn-gold:hover::after { left: 140%; }
    .btn-gold:hover {
      box-shadow: 0 0 50px #f0c060aa, 0 8px 30px #f0c06055;
      transform: translateY(-3px);
    }

    .btn-outline {
      padding: 16px 48px;
      background: transparent;
      border: 1px solid #00e5ff55;
      border-radius: 3px;
      color: var(--cyan);
      font-size: 16px;
      font-weight: 700;
      letter-spacing: 4px;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 0 20px #00e5ff22, inset 0 0 20px #00e5ff08;
      transition: all 0.3s;
      font-family: 'Noto Serif SC', serif;
    }

    .btn-outline:hover {
      background: #00e5ff0d;
      border-color: var(--cyan);
      box-shadow: 0 0 40px #00e5ff66, inset 0 0 30px #00e5ff11;
      transform: translateY(-3px);
    }

    /* Countdown */
    .hero-countdown {
      position: relative;
      z-index: 2;
      margin-top: 64px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 14px;
    }

    .cd-label {
      font-size: 11px;
      letter-spacing: 6px;
      color: #3a5060;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .cd-label::before, .cd-label::after {
      content: '';
      display: block;
      width: 30px;
      height: 1px;
      background: linear-gradient(90deg, transparent, #3a5060);
    }

    .cd-label::after { background: linear-gradient(90deg, #3a5060, transparent); }

    .cd-timer {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .cd-unit {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 5px;
    }

    .cd-num {
      width: 64px; height: 64px;
      background: linear-gradient(180deg, #0e1f38 0%, #060f1e 100%);
      border: 1px solid #00e5ff22;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'Orbitron', monospace;
      font-size: 26px;
      font-weight: 700;
      color: var(--cyan);
      position: relative;
      overflow: hidden;
      box-shadow: 0 0 15px #00e5ff11, inset 0 1px 0 #00e5ff11;
    }

    .cd-num::after {
      content: '';
      position: absolute;
      left: 0; right: 0;
      top: 50%; height: 1px;
      background: #00e5ff11;
    }

    .cd-text { font-size: 10px; letter-spacing: 2px; color: #2a4050; }
    .cd-sep { font-size: 30px; color: #00e5ff33; font-weight: 700; margin-bottom: 20px; }

    /* Mountains */
    .hero-mountains { position: absolute; bottom: 0; left: 0; right: 0; height: 380px; pointer-events: none; }

    /* Scroll indicator */
    .scroll-hint {
      position: absolute;
      bottom: 28px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      animation: scrollBounce 2s ease-in-out infinite;
    }

    .scroll-hint-text { font-size: 10px; letter-spacing: 4px; color: #2a4050; }

    .scroll-arrow {
      width: 20px; height: 20px;
      border-right: 1px solid #2a4050;
      border-bottom: 1px solid #2a4050;
      transform: rotate(45deg);
    }

    @keyframes scrollBounce {
      0%,100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
      50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
    }

    /* ============================================================
       SECTION SHARED
    ============================================================ */
    .sec {
      position: relative;
      z-index: 1;
      padding: 110px 72px;
    }

    .sec-head {
      text-align: center;
      margin-bottom: 72px;
    }

    .sec-eyebrow {
      font-family: 'Orbitron', monospace;
      font-size: 10px;
      letter-spacing: 6px;
      color: var(--cyan);
      margin-bottom: 16px;
    }

    .sec-title {
      font-size: clamp(28px, 4vw, 46px);
      font-weight: 900;
      letter-spacing: 6px;
      background: linear-gradient(135deg, #fff 0%, var(--gold-light) 50%, #fff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .sec-ornament {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      margin-top: 16px;
    }

    .orn-line {
      width: 60px; height: 1px;
      background: linear-gradient(90deg, transparent, var(--gold));
    }

    .orn-line.r { background: linear-gradient(90deg, var(--gold), transparent); }
    .orn-diamond { width: 6px; height: 6px; background: var(--gold); transform: rotate(45deg); }
    .orn-dot { width: 3px; height: 3px; background: var(--gold-dark); border-radius: 50%; }

    /* ============================================================
       FEATURES
    ============================================================ */
    .features { background: linear-gradient(180deg, var(--dark) 0%, var(--dark2) 100%); }

    .feat-grid {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .feat-card {
      position: relative;
      padding: 44px 36px;
      background: linear-gradient(160deg, #0d1f3a 0%, #060f1e 100%);
      border: 1px solid #ffffff0d;
      border-radius: 6px;
      overflow: hidden;
      transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
    }

    .feat-card-corner {
      position: absolute;
      width: 16px; height: 16px;
    }

    .feat-card-corner.tl { top: 0; left: 0; border-top: 1px solid; border-left: 1px solid; border-radius: 6px 0 0 0; }
    .feat-card-corner.tr { top: 0; right: 0; border-top: 1px solid; border-right: 1px solid; border-radius: 0 6px 0 0; }
    .feat-card-corner.bl { bottom: 0; left: 0; border-bottom: 1px solid; border-left: 1px solid; border-radius: 0 0 0 6px; }
    .feat-card-corner.br { bottom: 0; right: 0; border-bottom: 1px solid; border-right: 1px solid; border-radius: 0 0 6px 0; }

    .feat-card.c-cyan .feat-card-corner { border-color: var(--cyan); }
    .feat-card.c-gold .feat-card-corner { border-color: var(--gold); }
    .feat-card.c-purple .feat-card-corner { border-color: var(--purple-light); }

    .feat-card-glow {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity 0.4s;
      border-radius: 6px;
    }

    .c-cyan .feat-card-glow { background: radial-gradient(ellipse at top left, #00e5ff0d 0%, transparent 60%); }
    .c-gold .feat-card-glow { background: radial-gradient(ellipse at top left, #f0c0600d 0%, transparent 60%); }
    .c-purple .feat-card-glow { background: radial-gradient(ellipse at top left, #7c3aed0d 0%, transparent 60%); }

    .feat-card:hover { transform: translateY(-8px); }
    .feat-card:hover .feat-card-glow { opacity: 1; }

    .c-cyan:hover { border-color: #00e5ff22; box-shadow: 0 20px 60px #00000055, 0 0 30px #00e5ff11; }
    .c-gold:hover { border-color: #f0c06022; box-shadow: 0 20px 60px #00000055, 0 0 30px #f0c06011; }
    .c-purple:hover { border-color: #7c3aed22; box-shadow: 0 20px 60px #00000055, 0 0 30px #7c3aed11; }

    .feat-index {
      position: absolute;
      top: 24px; right: 28px;
      font-family: 'Orbitron', monospace;
      font-size: 56px;
      font-weight: 900;
      line-height: 1;
      opacity: 0.05;
    }

    .c-cyan .feat-index { color: var(--cyan); }
    .c-gold .feat-index { color: var(--gold); }
    .c-purple .feat-index { color: var(--purple-light); }

    .feat-icon { margin-bottom: 28px; width: 56px; height: 56px; }
    .feat-icon svg { width: 100%; height: 100%; }

    .feat-title {
      font-size: 18px;
      font-weight: 900;
      letter-spacing: 3px;
      color: #dde8ff;
      margin-bottom: 14px;
    }

    .feat-desc {
      font-size: 13px;
      line-height: 2.2;
      color: #4a6080;
      letter-spacing: 0.5px;
    }

    .feat-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 22px;
    }

    .chip {
      padding: 4px 12px;
      border-radius: 2px;
      font-size: 11px;
      letter-spacing: 2px;
    }

    .chip-cyan { background: #00e5ff0d; border: 1px solid #00e5ff2a; color: var(--cyan); }
    .chip-gold { background: #f0c0600d; border: 1px solid #f0c0602a; color: var(--gold); }
    .chip-purple { background: #7c3aed0d; border: 1px solid #7c3aed2a; color: var(--purple-light); }

    /* ============================================================
       REWARDS (simplified welfare card)
    ============================================================ */
    @keyframes armorFloat {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
    }

    /* 简化福利卡片 */
    .rwd-simple {
      max-width: 520px;
      margin: 0 auto;
    }
    .rwd-simple-card {
      display: flex;
      align-items: center;
      gap: 28px;
      padding: 36px 40px;
      background: linear-gradient(160deg, #0d1f3a 0%, #060f1e 100%);
      border: 1px solid #f0c06022;
      border-radius: 12px;
      position: relative;
      overflow: hidden;
    }
    .rwd-simple-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 20% 50%, #f0c06008, transparent 70%);
      pointer-events: none;
    }
    .rwd-simple-icon {
      font-size: 48px;
      flex-shrink: 0;
      animation: armorFloat 4s ease-in-out infinite;
    }
    .rwd-simple-text {
      position: relative;
      z-index: 1;
    }
    .rwd-simple-text p {
      font-size: 15px;
      line-height: 2.2;
      color: #c0d0e8;
      letter-spacing: 1px;
    }
    .rwd-simple-text p:first-child {
      color: var(--gold);
      font-size: 16px;
      font-weight: 600;
    }

    /* 开服福利卡片（版本特色区内） */
    .welfare-card {
      max-width: 480px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      gap: 32px;
      padding: 40px 44px;
      background: linear-gradient(160deg, #0d1f3a 0%, #060f1e 100%);
      border: 1px solid #f0c06022;
      border-radius: 12px;
      position: relative;
      overflow: hidden;
    }
    .welfare-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 15% 50%, #f0c0600a, transparent 60%);
      pointer-events: none;
    }
    .welfare-icon {
      font-size: 52px;
      flex-shrink: 0;
      animation: armorFloat 4s ease-in-out infinite;
    }
    .welfare-list {
      position: relative;
      z-index: 1;
    }
    .welfare-list p {
      font-size: 15px;
      line-height: 2.4;
      color: #b0c4de;
      letter-spacing: 1.5px;
    }
    .welfare-list p:first-child {
      color: var(--gold);
      font-size: 16px;
      font-weight: 600;
    }

    /* ============================================================
       RECHARGE
    ============================================================ */
    .recharge-sec {
      background: linear-gradient(180deg, var(--dark2) 0%, var(--dark) 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .rch-bg {
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse 70% 60% at 50% 50%, #f0c06008 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 20% 60%, #7c3aed06 0%, transparent 60%),
        radial-gradient(ellipse 40% 40% at 80% 30%, #00e5ff05 0%, transparent 60%);
    }

    .recharge-sec::before {
      content: '';
      position: absolute;
      top: 0; left: 10%; right: 10%;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--gold), transparent);
      opacity: 0.25;
    }

    .rch-cta {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 20px;
    }

    .rch-main-btn {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      padding: 16px 52px;
      background: linear-gradient(135deg, #1e1060 0%, #0a3060 100%);
      border: 1px solid var(--cyan);
      border-radius: 4px;
      color: var(--cyan);
      font-size: 16px;
      font-weight: 700;
      letter-spacing: 4px;
      text-decoration: none;
      box-shadow: 0 0 20px #00e5ff22, inset 0 0 20px #00e5ff06;
      transition: all 0.3s;
      font-family: 'Noto Serif SC', serif;
    }

    .rch-main-btn:hover {
      box-shadow: 0 0 40px #00e5ff55, inset 0 0 30px #00e5ff11;
      border-color: #00e5ffaa;
      transform: translateY(-2px);
    }

    .rch-pay-icons {
      display: flex;
      gap: 20px;
    }

    .rch-pay-icon {
      font-size: 12px;
      letter-spacing: 2px;
      color: #2a4050;
    }

    @media (max-width: 1100px) {
      .rch-packages { grid-template-columns: repeat(2, 1fr); max-width: 600px; }
    }
    @media (max-width: 640px) {
      .rch-packages { grid-template-columns: 1fr 1fr; }
      .rch-main-btn { padding: 14px 32px; font-size: 14px; }
    }

    /* ============================================================
       FOOTER
    ============================================================ */
    footer {
      padding: 48px 72px 32px;
      background: #010408;
      border-top: 1px solid #00e5ff0a;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 24px;
      border-top: 1px solid #0a1828;
    }

    .footer-copy { font-size: 11px; letter-spacing: 2px; color: #0e1e2a; }
    .footer-domain { font-family: 'Orbitron', monospace; font-size: 11px; color: #1e3040; letter-spacing: 2px; }

    /* ============================================================
       SCROLL ANIMATIONS
    ============================================================ */
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* ============================================================
       SCROLLBAR
    ============================================================ */
    ::-webkit-scrollbar { width: 3px; }
    ::-webkit-scrollbar-track { background: var(--dark); }
    ::-webkit-scrollbar-thumb { background: #00e5ff22; border-radius: 2px; }
    ::-webkit-scrollbar-thumb:hover { background: #00e5ff55; }

    /* ============================================================
       CURSOR
    ============================================================ */
    *, a, button { cursor: none !important; }

    /* 中心菱形 */
    #cur-diamond {
      position: fixed;
      width: 7px; height: 7px;
      background: #00e5ff;
      transform: translate(-50%, -50%) rotate(45deg);
      pointer-events: none;
      z-index: 9999;
      box-shadow: 0 0 10px #00e5ff, 0 0 22px rgba(0,229,255,0.5);
      transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
    }

    #cur-diamond.on-link {
      background: #f0c060;
      box-shadow: 0 0 12px #f0c060, 0 0 28px rgba(240,192,96,0.6);
      transform: translate(-50%, -50%) rotate(45deg) scale(1.4);
    }

    /* 四角瞄准框 */
    #cur-brackets {
      position: fixed;
      width: 26px; height: 26px;
      pointer-events: none;
      z-index: 9998;
      transform: translate(-50%, -50%);
      transition: width 0.2s, height 0.2s;
    }

    #cur-brackets.on-link { width: 38px; height: 38px; }

    #cur-brackets .cb {
      position: absolute;
      width: 8px; height: 8px;
      border-style: solid;
      border-color: #00e5ff;
      opacity: 0.85;
      transition: border-color 0.2s, width 0.2s, height 0.2s;
    }

    #cur-brackets.on-link .cb { border-color: #f0c060; width: 10px; height: 10px; }

    #cur-brackets .cb-tl { top:0; left:0;  border-width: 1.5px 0 0 1.5px; }
    #cur-brackets .cb-tr { top:0; right:0; border-width: 1.5px 1.5px 0 0; }
    #cur-brackets .cb-bl { bottom:0; left:0;  border-width: 0 0 1.5px 1.5px; }
    #cur-brackets .cb-br { bottom:0; right:0; border-width: 0 1.5px 1.5px 0; }

    #fx-canvas {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 9997;
    }

    /* ============================================================
       RESPONSIVE
    ============================================================ */
    @media (max-width: 1100px) {
      nav { padding: 0 28px; }
      .nav-links { display: none; }
      .sec { padding: 80px 28px; }
      .feat-grid { grid-template-columns: 1fr 1fr; }
      footer { padding: 40px 28px 24px; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }

    @media (max-width: 640px) {
      .feat-grid { grid-template-columns: 1fr; }
      .hero-buttons { align-items: stretch; text-align: center; }
      .hero-sub-btns { justify-content: center; gap: 10px; }
      .btn-main-dl { padding: 18px 56px; font-size: 17px; letter-spacing: 6px; }
      .btn-sub { padding: 12px 24px; font-size: 14px; }
      .hero-divider { width: 280px; }
    }

/* ════════════════════════════════════════════════════════════
   全局浮动组件 · 客服侧栏 + 公告 Toast（SOP §A.3）
   521 配色：金 #f0c060 / 青 #00e5ff / 紫 #7c3aed / 黑底
   ════════════════════════════════════════════════════════════ */

/* ===== 右下角浮动公告 Toast ===== */
.notice-toast { position: fixed; bottom: 24px; right: 24px; z-index: 9999; font-family: 'Noto Serif SC', serif; }
.notice-toast-trigger { position: absolute; bottom: 0; right: 0; width: 54px; height: 54px; border-radius: 50%; background: linear-gradient(135deg, var(--purple, #7c3aed), var(--cyan, #00e5ff)); border: 2px solid rgba(255,255,255,.18); color: #fff; cursor: pointer; box-shadow: 0 6px 24px rgba(124,58,237,.5), 0 0 0 1px rgba(0,229,255,.3) inset; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transform: scale(.6); transition: opacity .4s, transform .4s cubic-bezier(.22,1,.36,1); font-family: inherit; animation: ntTriggerPulse 2.4s ease-in-out infinite; }
.notice-toast.collapsed .notice-toast-trigger { opacity: 1; pointer-events: auto; transform: scale(1); }
.notice-toast-trigger:hover { transform: scale(1.08); box-shadow: 0 10px 32px rgba(0,229,255,.55); }
.notice-toast-trigger svg { width: 24px; height: 24px; filter: drop-shadow(0 1px 2px rgba(0,0,0,.3)); }
.notice-toast-dot { position: absolute; top: 6px; right: 6px; width: 10px; height: 10px; border-radius: 50%; background: #ff4060; border: 2px solid #050510; animation: ntDotPing 2s ease-in-out infinite; }
@keyframes ntTriggerPulse { 0%,100%{box-shadow: 0 6px 24px rgba(124,58,237,.5), 0 0 0 1px rgba(0,229,255,.3) inset} 50%{box-shadow: 0 6px 24px rgba(124,58,237,.5), 0 0 0 8px rgba(124,58,237,0) inset} }
@keyframes ntDotPing { 0%,100%{transform:scale(1)} 50%{transform:scale(1.3)} }

.notice-toast-box { width: 340px; background: linear-gradient(160deg, #060d1e, #0a1628); border: 1px solid rgba(0,229,255,0.28); border-radius: 14px; box-shadow: 0 16px 50px rgba(124,58,237,.3), 0 0 0 1px rgba(255,255,255,.04) inset; overflow: hidden; transform: translateX(0) translateY(0) scale(1); transform-origin: bottom right; opacity: 1; transition: transform .55s cubic-bezier(.22,1,.36,1), opacity .4s ease; max-height: calc(100vh - 60px); display: flex; flex-direction: column; }
.notice-toast.collapsed .notice-toast-box { transform: translateX(40px) translateY(40px) scale(.5); opacity: 0; pointer-events: none; }

.notice-toast-head { padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(0,229,255,0.12); position: relative; overflow: hidden; }
.notice-toast-head::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(124,58,237,.15), transparent 70%); }
.notice-toast-gold .notice-toast-head::before { background: linear-gradient(135deg, rgba(240,192,96,.2), transparent 70%); }
.notice-toast-cyan .notice-toast-head::before { background: linear-gradient(135deg, rgba(0,229,255,.18), transparent 70%); }
.notice-toast-purple .notice-toast-head::before { background: linear-gradient(135deg, rgba(124,58,237,.18), transparent 70%); }
.notice-toast-type { position: relative; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--cyan, #00e5ff); }
.notice-toast-gold .notice-toast-type { color: var(--gold, #f0c060); }
.notice-toast-cyan .notice-toast-type { color: var(--cyan, #00e5ff); }
.notice-toast-purple .notice-toast-type { color: #a78bfa; }
.notice-toast-close { position: relative; background: none; border: none; color: #7a8da8; font-size: 18px; cursor: pointer; width: 26px; height: 26px; border-radius: 50%; transition: all .2s; font-family: inherit; }
.notice-toast-close:hover { background: rgba(255,255,255,.08); color: #fff; transform: rotate(90deg); }

.notice-toast-body { padding: 16px 18px 12px; overflow-y: auto; flex: 1; }
.notice-toast-pin { display: inline-block; background: linear-gradient(135deg, var(--gold, #f0c060), #ffd870); color: #1a0e00; padding: 2px 8px; border-radius: 10px; font-size: 10px; font-weight: 800; letter-spacing: 1px; margin-bottom: 8px; }
.notice-toast-title { font-size: 16px; font-weight: 700; color: #e8f3ff; line-height: 1.45; margin-bottom: 6px; }
.notice-toast-date { font-size: 11px; color: #7a8da8; font-family: 'Orbitron', monospace; letter-spacing: 1px; margin-bottom: 10px; }
.notice-toast-content { font-size: 13px; line-height: 1.85; color: #c8d8f0; white-space: pre-wrap; word-break: break-word; max-height: 240px; overflow-y: auto; }
.notice-toast-content::-webkit-scrollbar { width: 4px; }
.notice-toast-content::-webkit-scrollbar-thumb { background: rgba(0,229,255,.3); border-radius: 2px; }

.notice-toast-foot { padding: 10px 18px 14px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid rgba(0,229,255,0.12); background: rgba(0,0,0,.15); gap: 8px; }
.notice-toast-nshow { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: #7a8da8; cursor: pointer; user-select: none; }
.notice-toast-nshow input { accent-color: var(--cyan, #00e5ff); cursor: pointer; width: 13px; height: 13px; }
.notice-toast-link { font-size: 12px; color: var(--cyan, #00e5ff); text-decoration: none; letter-spacing: 1px; transition: color .2s; }
.notice-toast-link:hover { color: var(--gold, #f0c060); }

@media (max-width: 600px) {
  .notice-toast { right: 12px; bottom: 12px; left: 12px; }
  .notice-toast-box { width: 100%; }
  .notice-toast-trigger { left: auto; right: 0; bottom: 0; }
}

/* ===== 右侧客服联系侧栏 ===== */
.side-bar {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9990;
  display: flex;
  align-items: stretch;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.side-bar.collapsed { transform: translateY(-50%) translateX(calc(100% - 44px)); }

.side-tab {
  width: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 18px 0;
  background: linear-gradient(180deg, #0d1f3a 0%, #060f1e 100%);
  border: 1px solid rgba(0,229,255,0.18);
  border-right: none;
  border-radius: 8px 0 0 8px;
  cursor: pointer;
  position: relative;
  transition: background 0.3s, border-color 0.3s;
}
.side-tab:hover { background: linear-gradient(180deg, #112a4a 0%, #0a1628 100%); border-color: rgba(0,229,255,0.35); }

.side-tab-icon { width: 20px; height: 20px; color: var(--cyan); }
.side-tab-text { font-size: 11px; letter-spacing: 3px; color: var(--cyan); writing-mode: vertical-rl; text-orientation: upright; line-height: 1.6; }
.side-tab-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #34d399;
  animation: sideDotBlink 2s ease-in-out infinite;
}
@keyframes sideDotBlink { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.4;transform:scale(.7)} }

.side-panel {
  width: 260px;
  background: linear-gradient(160deg, #060d1e, #0a1628);
  border: 1px solid rgba(0,229,255,0.18);
  border-left: none;
  border-radius: 0 8px 8px 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.side-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(0,229,255,0.1);
  position: relative;
}
.side-head::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0.08), transparent 70%);
  pointer-events: none;
}
.side-head-dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; position: relative; }
.side-head-text { font-size: 14px; font-weight: 600; color: #e0e8ff; position: relative; }
.side-head-close {
  margin-left: auto;
  background: none;
  border: none;
  color: #7a8da8;
  font-size: 16px;
  cursor: pointer;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  position: relative;
}
.side-head-close:hover { background: rgba(255,255,255,0.08); color: #fff; }

.side-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(0,229,255,0.06);
  transition: background 0.2s;
}
.side-row:hover { background: rgba(0,229,255,0.04); }
.side-row:last-child { border-bottom: none; }

.side-row-icon { font-size: 22px; flex-shrink: 0; }
.side-row-info { flex: 1; min-width: 0; }
.side-row-label { font-size: 11px; color: #7a8da8; letter-spacing: 1px; margin-bottom: 2px; }
.side-row-value { font-size: 14px; color: #e0e8ff; font-weight: 600; letter-spacing: 0.5px; }

.side-row-copy {
  width: 32px; height: 32px;
  border-radius: 6px;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.15);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}
.side-row-copy svg { width: 14px; height: 14px; }
.side-row-copy:hover { background: rgba(0,229,255,0.15); border-color: rgba(0,229,255,0.35); }
.side-row-copy.copied { background: rgba(52,211,153,0.15); border-color: rgba(52,211,153,0.4); color: #34d399; }

@media (max-width: 768px) {
  .side-bar { top: auto; bottom: 0; right: 0; left: 0; transform: none; flex-direction: column-reverse; }
  .side-bar.collapsed { transform: none; }
  .side-tab { width: 100%; flex-direction: row; border-radius: 8px 8px 0 0; padding: 10px 0; }
  .side-tab-text { writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: 6px; }
  .side-panel { width: 100%; border-radius: 0; border-left: 1px solid rgba(0,229,255,0.18); border-top: none; max-height: 0; transition: max-height 0.35s ease; }
  .side-bar:not(.collapsed) .side-panel { max-height: 300px; }
}

/* 数据驱动版 feature-icon emoji 兜底 */
.feat-icon-emoji { font-size: 44px; line-height: 1; margin: 4px 0 18px; text-align: left; filter: drop-shadow(0 0 14px rgba(0,229,255,0.35)); }
.c-gold   .feat-icon-emoji { filter: drop-shadow(0 0 14px rgba(240,192,96,0.35)); }
.c-purple .feat-icon-emoji { filter: drop-shadow(0 0 14px rgba(167,139,250,0.35)); }