/* ===== 主题与基线样式 ===== */
:root {
    --bg: #0b0d12;
    --bg-elev: #10131a;
    --card: #121622;
    --card-2: #0c101a;
    --txt: #e6e9ee;
    --txt-dim: #a7b0c0;
    --brand: #00d1ff;
    --brand-2: #6cf3ff;
    --accent: #7a7dff;
    --ok: #32d583;
    --warn: #ffb020;
    --danger: #ff5d5d;
    --ring: rgba(0, 209, 255, 0.35);
    --shadow: 0 10px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.02);
    --radius-xl: 22px;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 10px;
    --w-max: 1160px;
    --nav-height: 66px;
}

html, body {
    background: var(--bg);
    color: var(--txt);
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, PingFang SC, Noto Sans CJK SC, Microsoft YaHei, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
    letter-spacing: .2px;
    line-height: 1.5;
    scroll-behavior: smooth;
}

* { box-sizing: border-box; }
a { color: inherit; text-decoration: none; transition: color .2s; }
img { max-width: 100%; display: block; }
ul { list-style: none; padding: 0; margin: 0; }

.container { max-width: var(--w-max); margin: 0 auto; padding: 0 24px; }

/* ===== 动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

/* ===== 导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,.06);
    background: linear-gradient(180deg, rgba(7,8,13,.8), rgba(7,8,13,.3));
    height: var(--nav-height);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    letter-spacing: .3px;
    font-size: 18px;
    color: var(--txt);
}

.logo img {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.1);
}

.desktop-nav ul {
    display: flex;
    gap: 24px;
    align-items: center;
}

.desktop-nav a {
    font-size: 14px;
    opacity: .9;
    color: var(--txt);
}

.desktop-nav a:hover {
    opacity: 1;
    color: var(--brand);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--txt);
    transition: 0.3s;
}

/* Mobile Nav */
.mobile-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(11, 13, 18, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
    transform: translateY(-100%);
    transition: transform 0.3s ease-in-out;
    z-index: 999;
    border-bottom: 1px solid rgba(255,255,255,.06);
    opacity: 0;
    pointer-events: none;
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-nav a {
    font-size: 16px;
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--txt);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.08);
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(0,0,0,.2));
    color: var(--txt);
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow);
    transition: transform .15s ease, box-shadow .2s ease, border-color .2s;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-1px);
    border-color: rgba(255,255,255,.18);
}

.btn.primary {
    background: linear-gradient(180deg, #00d1ff, #389bff);
    color: #021018;
    border-color: rgba(255,255,255,.0);
    font-weight: 600;
}

/* ===== 通用区块 ===== */
.section {
    padding: 100px 0;
    position: relative;
}

.section.light {
    background: radial-gradient(1000px 400px at 50% -200px, rgba(0, 209, 255, .08), transparent 60%),
                radial-gradient(1000px 400px at 90% 0px, rgba(122, 125, 255, .06), transparent 60%);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 32px;
    margin: 0 0 16px;
    font-weight: 700;
}

.section-header p {
    color: var(--txt-dim);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Hero Section ===== */
.hero-section {
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
    overflow: clip;
}

.hero-section .glow {
    position: absolute;
    inset: -30% -20% auto -20%;
    height: 100vh;
    background:
        radial-gradient(700px 300px at 20% 10%, rgba(0,209,255,.15), transparent 60%),
        radial-gradient(800px 400px at 80% -10%, rgba(122,125,255,.12), transparent 60%),
        radial-gradient(900px 600px at 50% 10%, rgba(0,0,0,.45), transparent 70%);
    filter: blur(60px);
    pointer-events: none;
    z-index: -1;
}

.hero-content h1 {
    margin: 0 auto 24px;
    font-size: clamp(40px, 6vw, 72px);
    line-height: 1.1;
    letter-spacing: -0.02em;
    font-weight: 800;
}

.hero-content .highlight {
    background: linear-gradient(135deg, #fff 0%, #a7b0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-bottom: 10px;
}

.hero-subtitle {
    margin: 0 auto 40px;
    max-width: 800px;
    color: var(--txt-dim);
    font-size: clamp(18px, 2.4vw, 20px);
    line-height: 1.6;
}

.hero-bg-elements {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

.floating-code {
    position: absolute;
    width: 160px;
    height: 100px;
    background: linear-gradient(135deg, rgba(0,209,255,0.03), rgba(122,125,255,0.03));
    border: 1px solid rgba(255,255,255,0.03);
    border-radius: 12px;
    backdrop-filter: blur(2px);
}

.code-1 { top: 15%; left: 5%; transform: rotate(-12deg); animation: float 8s ease-in-out infinite; }
.code-2 { top: 25%; right: 8%; transform: rotate(12deg); animation: float 9s ease-in-out infinite 1s; }
.code-3 { bottom: 15%; left: 15%; transform: rotate(6deg); animation: float 10s ease-in-out infinite 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(var(--rot)); }
    50% { transform: translateY(-20px) rotate(var(--rot)); }
}

.code-1 { --rot: -12deg; }
.code-2 { --rot: 12deg; }
.code-3 { --rot: 6deg; }

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(0,0,0,.1));
    border: 1px solid rgba(255,255,255,.06);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(4px);
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 14px;
    color: var(--txt-dim);
}

/* ===== Cards & Grid ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(0,0,0,.16));
    border: 1px solid rgba(255,255,255,.08);
    box-shadow: var(--shadow);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: transform .2s, border-color .2s;
}

.card:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,.15);
}

.card h3 {
    margin: 16px 0 8px;
    font-size: 18px;
    color: var(--txt);
}

.card p {
    margin: 0;
    color: var(--txt-dim);
    font-size: 14px;
    line-height: 1.6;
}

.icon-box {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: radial-gradient(80% 100% at 30% 0%, rgba(0,209,255,.2), rgba(122,125,255,.1));
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.1);
    font-size: 24px;
    color: var(--brand);
}

/* ===== Category Cards ===== */
.category-card {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
    padding: 20px;
    gap: 16px;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
}

.category-card:hover {
    background: rgba(255,255,255,0.05);
    border-color: var(--brand);
    transform: translateY(-4px);
}

.category-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0,209,255,0.1), rgba(122,125,255,0.05));
    border: 1px solid rgba(255,255,255,0.08);
    font-size: 16px;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: 0;
    flex-shrink: 0;
    font-family: monospace;
}

.category-card p {
    font-size: 13px;
    line-height: 1.5;
    color: var(--txt-dim);
    margin: 0;
}

/* ===== Process Steps ===== */
.steps-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.step-card {
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(0,0,0,.18));
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-weight: 700;
    background: linear-gradient(180deg, var(--brand), var(--accent));
    color: #07131a;
    font-size: 14px;
}

.step-card h4 {
    margin: 0;
    font-size: 16px;
}

.step-card p {
    margin: 0;
    font-size: 13px;
    color: var(--txt-dim);
}

/* ===== Reviews ===== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(0,0,0,.2));
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.order-tag {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(0, 209, 255, 0.1);
    color: var(--brand);
    border: 1px solid rgba(0, 209, 255, 0.2);
}

.rating {
    color: var(--warn);
    font-size: 14px;
}

.review-content {
    font-size: 15px;
    line-height: 1.6;
    color: var(--txt-dim);
    font-style: normal;
    margin: 0;
}
    margin-top: 24px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    cursor: pointer;
    transition: 0.3s;
}

.dot.active {
    background: var(--brand);
    transform: scale(1.2);
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(0,0,0,.2));
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.contact-card h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 20px;
}

.contact-card p {
    margin: 0;
    color: var(--txt-dim);
    font-size: 14px;
}

.qr-box {
    width: 180px;
    height: 180px;
    padding: 10px;
    background: #fff;
    border-radius: 12px;
    margin-bottom: 16px;
}

.qr-box img {
    width: 100%;
    height: 100%;
}

.email-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    font-size: 18px;
    color: var(--brand);
    margin-bottom: 16px;
    padding: 30px 0;
}

.email-box svg {
    font-size: 48px;
    color: var(--brand);
}

.email-box span {
    font-size: 20px;
    font-weight: 600;
    color: var(--txt);
}

/* ===== Footer ===== */
.site-footer {
    padding: 12px 0;
    border-top: 1px solid rgba(255,255,255,.06);
    color: var(--txt-dim);
    font-size: 12px;
    background: var(--bg-elev);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.filing {
    display: flex;
    gap: 12px;
    align-items: center;
}

.filing img {
    width: 16px;
    height: 16px;
}

.filing a:hover {
    color: var(--txt);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-3, .grid-4, .stats-grid, .steps-container, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .desktop-nav { display: none; }
    .mobile-menu-btn { display: flex; }
    
    .hero-content h1 { font-size: 36px; }
    .hero-subtitle { font-size: 16px; }
    
    .grid-3, .grid-4, .stats-grid, .steps-container, .contact-grid, .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}