/* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --red:    #C0392B;
      --red2:   #922B21;
      --gold:   #D4AC0D;
      --dark:   #1A1A2E;
      --gray:   #4A4A5A;
      --light:  #F5F5F5;
      --white:  #FFFFFF;
      --shadow: 0 8px 32px rgba(0,0,0,0.12);
    }
    html { scroll-behavior: smooth; }
    body { font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif; color: var(--dark); background: var(--white); }
    a { text-decoration: none; color: inherit; }
    img { display: block; max-width: 100%; }

    /* ===== Scrollbar ===== */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: #f0f0f0; }
    ::-webkit-scrollbar-thumb { background: var(--red); border-radius: 3px; }

    /* ===== Navbar ===== */
    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
      display: flex; align-items: center; justify-content: space-between;
      padding: 0 6%;
      height: 70px;
      background: rgba(26,26,46,0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0,0,0,0.3);
    }
    .nav-logo { display: flex; align-items: center; gap: 12px; }
    .nav-logo .logo-img {
      height: 40px; width: auto;
      filter: brightness(1.1);
    }
    .nav-logo span { color: #fff; font-size: 18px; font-weight: 700; letter-spacing: 1px; }
    .nav-links { display: flex; gap: 36px; }
    .nav-links a { color: rgba(255,255,255,0.82); font-size: 14px; transition: color .25s; }
    .nav-links a:hover { color: var(--gold); }
    .nav-cta {
      background: var(--red); color: #fff; padding: 9px 22px;
      border-radius: 6px; font-size: 14px; font-weight: 600;
      transition: background .25s, transform .2s;
    }
    .nav-cta:hover { background: var(--red2); transform: translateY(-1px); }

    /* ===== Hero ===== */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #1A1A2E 0%, #16213E 40%, #0F3460 100%);
      display: flex; align-items: center; justify-content: center;
      text-align: center; padding: 100px 6% 60px;
      position: relative; overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute; inset: 0;
      background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    }
    /* Animated rings */
    .hero-ring {
      position: absolute; border-radius: 50%;
      border: 1px solid rgba(192,57,43,0.15);
      animation: pulse 6s ease-in-out infinite;
    }
    .hero-ring:nth-child(1) { width: 400px; height: 400px; top: 50%; left: 50%; transform: translate(-50%,-50%); }
    .hero-ring:nth-child(2) { width: 600px; height: 600px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: 1s; }
    .hero-ring:nth-child(3) { width: 800px; height: 800px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: 2s; }
    @keyframes pulse { 0%,100%{opacity:.4;} 50%{opacity:1;} }

    .hero-content { position: relative; z-index: 2; max-width: 800px; }
    .hero-badge {
      display: inline-block; background: rgba(192,57,43,0.2); border: 1px solid rgba(192,57,43,0.5);
      color: #F1948A; padding: 6px 16px; border-radius: 20px; font-size: 13px;
      margin-bottom: 24px; letter-spacing: 2px;
    }
    .hero h1 {
      font-size: clamp(36px, 6vw, 64px); color: #fff;
      font-weight: 900; line-height: 1.15; margin-bottom: 12px;
      text-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }
    .hero h1 em { color: var(--gold); font-style: normal; }
    .hero .sub {
      font-size: clamp(18px, 2.5vw, 24px); color: rgba(255,255,255,0.7);
      margin-bottom: 16px; font-weight: 300;
    }
    .hero .tagline { font-size: 15px; color: rgba(255,255,255,0.5); margin-bottom: 48px; letter-spacing: 1px; }
    .hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
    .btn-primary {
      background: var(--red); color: #fff; padding: 14px 36px;
      border-radius: 8px; font-size: 16px; font-weight: 700;
      transition: all .3s; box-shadow: 0 4px 20px rgba(192,57,43,0.4);
    }
    .btn-primary:hover { background: var(--red2); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(192,57,43,0.5); }
    .btn-outline {
      background: transparent; color: #fff; padding: 14px 36px;
      border: 2px solid rgba(255,255,255,0.4); border-radius: 8px; font-size: 16px;
      transition: all .3s;
    }
    .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

    .hero-stats {
      display: flex; gap: 48px; justify-content: center; margin-top: 64px;
      padding-top: 48px; border-top: 1px solid rgba(255,255,255,0.1);
      flex-wrap: wrap;
    }
    .stat-item { text-align: center; }
    .stat-num { font-size: 40px; font-weight: 900; color: var(--gold); line-height: 1; }
    .stat-num sup { font-size: 20px; }
    .stat-label { font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 6px; }

    /* ===== Section Common ===== */
    section { padding: 100px 6%; }
    .section-tag { font-size: 13px; color: var(--red); letter-spacing: 3px; font-weight: 600; margin-bottom: 12px; }
    .section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 900; color: var(--dark); margin-bottom: 16px; line-height: 1.2; }
    .section-desc { font-size: 16px; color: var(--gray); /*max-width: 600px;*/ line-height: 1.8; }
    .text-center { text-align: center; }
    .text-center .section-desc { margin: 0 auto; }

    /* ===== About ===== */
    #about { background: var(--light); }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
    .about-visual {
      position: relative; aspect-ratio: 1/1; max-width: 460px;
      background: linear-gradient(135deg, var(--red) 0%, var(--red2) 100%);
      border-radius: 24px; display: flex; align-items: center; justify-content: center;
      box-shadow: var(--shadow);
    }
    .about-visual .big-icon { font-size: 120px; opacity: .9; }
    .about-badge-card {
      position: absolute; bottom: -20px; right: -20px;
      background: #fff; border-radius: 16px; padding: 20px 24px;
      box-shadow: var(--shadow); text-align: center;
    }
    .about-badge-card .num { font-size: 36px; font-weight: 900; color: var(--red); }
    .about-badge-card .txt { font-size: 12px; color: var(--gray); }

    .about-points { margin-top: 40px; display: flex; flex-direction: column; gap: 20px; }
    .about-point {
      display: flex; gap: 16px; align-items: flex-start;
      background: #fff; border-radius: 12px; padding: 20px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
      transition: transform .2s, box-shadow .2s;
    }
    .about-point:hover { transform: translateX(6px); box-shadow: 0 6px 24px rgba(0,0,0,0.1); }
    .ap-icon { font-size: 28px; flex-shrink: 0; }
    .ap-title { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
    .ap-desc { font-size: 13px; color: var(--gray); line-height: 1.6; }

    /* ===== Features ===== */
    #features { background: var(--white); }
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 60px; }
    .feat-card {
      background: var(--light); border-radius: 20px; padding: 36px 28px;
      border: 1px solid rgba(0,0,0,0.05);
      transition: transform .3s, box-shadow .3s, border-color .3s;
      position: relative; overflow: hidden;
    }
    .feat-card::before {
      content: "";
      position: absolute; top: 0; left: 0; right: 0; height: 4px;
      background: linear-gradient(90deg, var(--red), var(--gold));
      opacity: 0; transition: opacity .3s;
    }
    .feat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
    .feat-card:hover::before { opacity: 1; }
    .feat-num { font-size: 52px; font-weight: 900; color: rgba(192,57,43,0.1); line-height: 1; margin-bottom: 12px; }
    .feat-icon { font-size: 40px; margin-bottom: 16px; }
    .feat-title { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
    .feat-text { font-size: 14px; color: var(--gray); line-height: 1.8; }

    /* ===== Tech ===== */
    #tech {
      background: linear-gradient(135deg, var(--dark) 0%, #16213E 100%);
      color: #fff;
    }
    #tech .section-title { color: #fff; }
    #tech .section-desc { color: rgba(255,255,255,0.6); }
    .tech-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 60px; }
    .tech-card {
      background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
      border-radius: 20px; padding: 32px 28px;
      transition: background .3s, transform .3s;
    }
    .tech-card:hover { background: rgba(192,57,43,0.15); transform: translateY(-6px); border-color: rgba(192,57,43,0.4); }
    .tech-icon { font-size: 42px; margin-bottom: 18px; }
    .tech-title { font-size: 17px; font-weight: 800; color: #fff; margin-bottom: 6px; }
    .tech-sub { font-size: 12px; color: var(--gold); margin-bottom: 14px; font-weight: 600; letter-spacing: 1px; }
    .tech-text { font-size: 13px; color: rgba(255,255,255,0.65); line-height: 1.8; }

    /* ===== Specs ===== */
    #specs { background: var(--light); }
    .specs-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 60px; }
    .specs-table-wrap { background: #fff; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow); }
    table { width: 100%; border-collapse: collapse; }
    thead th { background: var(--red); color: #fff; padding: 14px 20px; font-size: 14px; text-align: left; }
    tbody tr:nth-child(even) { background: #FAFAFA; }
    tbody tr:hover { background: #FFF0EE; }
    td { padding: 13px 20px; font-size: 13.5px; border-bottom: 1px solid #F0F0F0; color: var(--dark); }
    td:first-child { font-weight: 600; color: var(--gray); }
    td:last-child { color: var(--dark); font-weight: 500; }

    .specs-highlights { display: flex; flex-direction: column; gap: 20px; }
    .spec-hl {
      background: #fff; border-radius: 16px; padding: 24px 28px;
      box-shadow: 0 2px 16px rgba(0,0,0,0.07);
      display: flex; align-items: center; gap: 20px;
      transition: transform .2s;
    }
    .spec-hl:hover { transform: translateX(6px); }
    .spec-hl .hl-icon {
      width: 56px; height: 56px; background: linear-gradient(135deg, var(--red), var(--red2));
      border-radius: 14px; display: flex; align-items: center; justify-content: center;
      font-size: 26px; flex-shrink: 0;
    }
    .hl-title { font-size: 16px; font-weight: 800; margin-bottom: 4px; }
    .hl-val { font-size: 22px; font-weight: 900; color: var(--red); }
    .hl-unit { font-size: 13px; color: var(--gray); }

    /* ===== Scenarios ===== */
    #scenarios { background: var(--white); }
    .scenarios-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; margin-top: 60px; }
    .sc-card {
      background: var(--light); border-radius: 20px; padding: 32px 22px;
      text-align: center; transition: all .3s;
      border: 2px solid transparent;
    }
    .sc-card:hover { background: #fff; border-color: var(--red); transform: translateY(-8px); box-shadow: var(--shadow); }
    .sc-icon { font-size: 52px; margin-bottom: 16px; }
    .sc-title { font-size: 18px; font-weight: 800; margin-bottom: 10px; color: var(--dark); }
    .sc-text { font-size: 13px; color: var(--gray); line-height: 1.7; }

    /* ===== Cases ===== */
    #cases { background: var(--light); }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 60px;
      padding: 0 10%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
    }
    .case-card {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      aspect-ratio: 4/3;
      cursor: pointer;
      box-shadow: var(--shadow);
      transition: transform .3s, box-shadow .3s;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 48px rgba(0,0,0,0.2);
    }
    .case-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .5s;
    }
    .case-card:hover .case-img {
      transform: scale(1.08);
    }
    .case-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(26,26,46,0.9) 0%, transparent 60%);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 20px;
      opacity: 0;
      transition: opacity .3s;
    }
    .case-card:hover .case-overlay {
      opacity: 1;
    }
    .case-title {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .case-year {
      color: var(--gold);
      font-size: 13px;
      font-weight: 600;
    }
    @media (max-width: 768px) {
      .cases-grid { grid-template-columns: 1fr; padding: 0 6%; max-width: 400px; }
    }

    /* ===== Process ===== */
    #process { background: var(--light); }
    .process-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; margin-top: 60px; position: relative; }
    .process-steps::before {
      content: "";
      position: absolute; top: 40px; left: 16%; right: 16%;
      height: 2px; background: linear-gradient(90deg, var(--red), var(--gold));
    }
    .proc-step { padding: 0 24px; text-align: center; }
    .proc-circle {
      width: 80px; height: 80px; border-radius: 50%;
      background: linear-gradient(135deg, var(--red), var(--red2));
      display: flex; align-items: center; justify-content: center;
      margin: 0 auto 20px; font-size: 32px;
      box-shadow: 0 6px 24px rgba(192,57,43,0.35);
      position: relative; z-index: 1;
    }
    .proc-title { font-size: 17px; font-weight: 800; margin-bottom: 12px; }
    .proc-text { font-size: 13px; color: var(--gray); line-height: 1.7; }

    /* ===== Security ===== */
    #security {
      background: linear-gradient(135deg, #0F3460 0%, #16213E 50%, #1A1A2E 100%);
      color: #fff;
    }
    #security .section-title { color: #fff; }
    #security .section-desc { color: rgba(255,255,255,0.6); }
    .security-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 60px; }
    .sec-card {
      background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
      border-radius: 20px; padding: 32px 26px;
      transition: all .3s;
    }
    .sec-card:hover { background: rgba(212,172,13,0.1); border-color: rgba(212,172,13,0.4); transform: translateY(-6px); }
    .sec-num {
      display: inline-flex; width: 40px; height: 40px; border-radius: 50%;
      background: var(--gold); color: var(--dark); font-weight: 900; font-size: 18px;
      align-items: center; justify-content: center; margin-bottom: 16px;
    }
    .sec-title { font-size: 17px; font-weight: 800; color: #fff; margin-bottom: 12px; }
    .sec-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
    .sec-list li { font-size: 13px; color: rgba(255,255,255,0.65); padding-left: 16px; position: relative; line-height: 1.7; }
    .sec-list li::before { content: "·"; position: absolute; left: 0; color: var(--gold); font-size: 20px; top: -3px; }

    /* ===== Service ===== */
    #service { background: var(--white); }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; margin-top: 60px; }
    .srv-card {
      background: var(--light); border-radius: 20px; padding: 36px 28px;
      transition: all .3s;
    }
    .srv-card:hover { background: var(--red); color: #fff; transform: translateY(-8px); box-shadow: var(--shadow); }
    .srv-card:hover .srv-title,
    .srv-card:hover .srv-item { color: rgba(255,255,255,0.9); }
    .srv-icon { font-size: 44px; margin-bottom: 20px; }
    .srv-title { font-size: 19px; font-weight: 800; margin-bottom: 18px; transition: color .3s; }
    .srv-items { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .srv-item { font-size: 13.5px; color: var(--gray); padding-left: 18px; position: relative; line-height: 1.6; transition: color .3s; }
    .srv-item::before { content: "✓"; position: absolute; left: 0; color: var(--red); font-weight: 700; }
    .srv-card:hover .srv-item::before { color: rgba(255,255,255,0.8); }

    /* ===== Guarantee ===== */
    #guarantee { background: var(--light); }
    .guarantee-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 60px; }
    .gu-card {
      background: #fff; border-radius: 20px; padding: 36px 32px;
      box-shadow: var(--shadow); display: flex; gap: 24px; align-items: flex-start;
    }
    .gu-icon-wrap {
      width: 64px; height: 64px; border-radius: 16px; flex-shrink: 0;
      background: linear-gradient(135deg, var(--red), var(--red2));
      display: flex; align-items: center; justify-content: center; font-size: 30px;
    }
    .gu-title { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
    .gu-text { font-size: 14px; color: var(--gray); line-height: 1.8; }

    /* ===== Contact / CTA ===== */
    #contact {
      background: linear-gradient(135deg, var(--red) 0%, var(--red2) 100%);
      text-align: center; padding: 100px 6%;
    }
    #contact .section-tag { color: rgba(255,255,255,0.7); }
    #contact .section-title { color: #fff; margin-bottom: 16px; }
    #contact .section-desc { color: rgba(255,255,255,0.8); margin: 0 auto 48px; }
    .contact-info { display: flex; gap: 48px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
    .ci-item { display: flex; align-items: center; gap: 12px; background: rgba(255,255,255,0.15); padding: 14px 28px; border-radius: 12px; }
    .ci-icon { font-size: 22px; }
    .ci-txt { color: #fff; font-size: 16px; font-weight: 600; }
    .btn-white {
      background: #fff; color: var(--red); padding: 16px 44px;
      border-radius: 10px; font-size: 17px; font-weight: 800;
      display: inline-block; transition: all .3s;
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }
    .btn-white:hover { transform: translateY(-4px); box-shadow: 0 10px 40px rgba(0,0,0,0.25); }

    /* ===== Footer ===== */
    footer {
      background: var(--dark); color: rgba(255,255,255,0.5);
      text-align: center; padding: 32px 6%; font-size: 13px;
    }
    footer a { color: rgba(255,255,255,0.5); margin: 0 6px; }
    footer a:hover { color: #fff; }

    /* ===== Animations ===== */
    .fade-in { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
    .fade-in.visible { opacity: 1; transform: translateY(0); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .features-grid, .tech-grid, .security-grid, .service-grid { grid-template-columns: repeat(2,1fr); }
      .scenarios-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      nav { padding: 0 4%; }
      .nav-links { display: none; }
      .about-grid, .specs-wrapper, .guarantee-cards { grid-template-columns: 1fr; }
      .features-grid, .tech-grid, .security-grid, .service-grid, .scenarios-grid, .process-steps { grid-template-columns: 1fr; }
      .process-steps::before { display: none; }
      .hero-stats { gap: 28px; }
    }