/* ============================
   跑路云 - 白蓝主题 (阿里云/腾讯云风格)
   ============================ */

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f5ff;
    --accent: #1677ff;
    --accent-light: #4096ff;
    --accent-dark: #0958d9;
    --accent-glow: rgba(22, 119, 255, 0.15);
    --accent-bg: #e6f4ff;
    --warning: #fa8c16;
    --danger: #f5222d;
    --success: #52c41a;
    --text: #1d2129;
    --text-secondary: #4e5969;
    --text-muted: #86909c;
    --border: #e5e6eb;
    --border-accent: rgba(22, 119, 255, 0.3);
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    --font-heading: 'Outfit', 'Noto Sans SC', sans-serif;
    --font-body: 'DM Sans', 'Noto Sans SC', sans-serif;
    --font-cn: 'Noto Sans SC', sans-serif;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

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

.section {
    padding: 80px 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-light);
    box-shadow: 0 4px 16px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-bg);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-outline:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-1px);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
    border-radius: 8px;
}

/* ============================
   导航栏
   ============================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.6);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo-emoji {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--accent);
    border-radius: 8px;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    padding: 8px 14px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-links a:hover {
    color: var(--accent);
    background: var(--accent-bg);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }
    .nav-links.active {
        display: flex;
    }
    .mobile-toggle {
        display: block;
    }
}

/* ============================
   Hero
   ============================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(180deg, #e6f4ff 0%, #ffffff 60%, #f5f7fa 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(22, 119, 255, 0.12), transparent),
        radial-gradient(ellipse 60% 60% at 80% 50%, rgba(22, 119, 255, 0.06), transparent),
        radial-gradient(ellipse 50% 50% at 20% 80%, rgba(22, 119, 255, 0.04), transparent);
    z-index: 0;
}

.hero-floats {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.float-item {
    position: absolute;
    top: var(--x, 20%);
    font-size: 2rem;
    opacity: 0.1;
    animation: floatUp var(--dur, 15s) linear infinite;
    animation-delay: var(--delay, 0s);
}

@keyframes floatUp {
    0% {
        transform: translateY(110vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    90% {
        opacity: 0.1;
    }
    100% {
        transform: translateY(-10vh) rotate(360deg);
        opacity: 0;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
    color: var(--text);
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.hero-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.hero-showcase {
    position: relative;
    z-index: 2;
    max-width: 960px;
    margin: 48px auto 0;
    padding: 0 24px;
}

.hero-showcase-inner {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(22,119,255,0.1),
        0 20px 60px -12px rgba(0,0,0,0.3),
        0 0 120px -40px rgba(22,119,255,0.15);
    transition: transform 0.5s cubic-bezier(.25,.46,.45,.94), box-shadow 0.5s ease;
}

.hero-showcase-inner:hover {
    transform: translateY(-4px);
    box-shadow:
        0 0 0 1px rgba(22,119,255,0.2),
        0 30px 80px -12px rgba(0,0,0,0.35),
        0 0 160px -40px rgba(22,119,255,0.2);
}

.hero-showcase-glow {
    position: absolute;
    inset: -2px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(22,119,255,0.3), rgba(139,92,246,0.15), rgba(22,119,255,0.1));
    z-index: -1;
    opacity: 0.6;
    animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.7; }
}

.hero-showcase-img {
    display: block;
    width: 100%;
    height: auto;
    min-height: 300px;
    object-fit: cover;
}

.hero-showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 28px;
    background: linear-gradient(transparent, rgba(0,0,0,0.75));
}

.hero-showcase-stats {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.showcase-stat {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.3px;
}

.showcase-stat strong {
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    text-decoration: none;
    animation: scrollBounce 2s ease-in-out infinite;
    transition: opacity 0.3s;
}

.hero-scroll-hint:hover {
    opacity: 0.7;
}

.scroll-text {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.scroll-arrow {
    opacity: 0.7;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@media (max-width: 768px) {
    .hero-showcase {
        max-width: 100%;
        padding: 0 16px;
    }
    .hero-showcase-img {
        min-height: 200px;
    }
    .hero-showcase-stats {
        gap: 16px;
    }
    .showcase-stat {
        font-size: 0.75rem;
    }
    .hero-scroll-hint {
        bottom: 16px;
    }
}

/* ============================
   数据统计条
   ============================ */

.stats-bar {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    display: inline;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .stat-number {
        font-size: 2rem;
    }
}

/* ============================
   定价
   ============================ */

.pricing-section {
    background: var(--bg-primary);
}

.promo-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #fff7e6 0%, #fff1e0 50%, #ffe7ba 100%);
    border: 1px solid rgba(250, 140, 22, 0.3);
    border-radius: var(--radius-lg);
    padding: 16px 28px;
    margin-bottom: 28px;
    gap: 20px;
    flex-wrap: wrap;
}

.promo-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.promo-hot {
    background: linear-gradient(135deg, #ff4d4f, #fa8c16);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 4px;
    white-space: nowrap;
    animation: promoPulse 1.5s ease-in-out infinite;
}

@keyframes promoPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.promo-text {
    font-size: 0.92rem;
    color: #874d00;
}

.promo-text strong {
    color: #d4380d;
    font-size: 1.1rem;
}

.promo-right {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.promo-timer {
    font-size: 0.82rem;
    color: #ad6800;
    font-family: var(--font-heading);
    background: rgba(250, 140, 22, 0.12);
    padding: 4px 12px;
    border-radius: 4px;
    white-space: nowrap;
}

.promo-btn {
    background: linear-gradient(135deg, #ff4d4f, #fa8c16);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 6px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.promo-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(250, 140, 22, 0.3);
}

@media (max-width: 768px) {
    .promo-banner {
        flex-direction: column;
        text-align: center;
        padding: 16px 20px;
    }
    .promo-left {
        flex-direction: column;
    }
    .promo-right {
        flex-direction: column;
    }
}

.region-selector {
    margin: 0 0 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
}

.region-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}

.region-tab {
    padding: 8px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-cn);
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.region-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.region-tab.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.region-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.node-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.82rem;
    font-family: var(--font-cn);
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.node-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-bg);
}

.node-chip.active {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-bg);
    font-weight: 600;
}

.chip-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.chip-green {
    background: var(--success);
    box-shadow: 0 0 4px rgba(82, 196, 26, 0.4);
}

.chip-yellow {
    background: var(--warning);
    box-shadow: 0 0 4px rgba(250, 140, 22, 0.4);
}

.chip-red {
    background: var(--danger);
    box-shadow: 0 0 4px rgba(245, 34, 45, 0.4);
}

.region-legend {
    display: flex;
    gap: 20px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.pricing-config-bar {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 28px;
    padding: 12px 24px;
    background: var(--accent-bg);
    border: 1px solid rgba(22, 119, 255, 0.12);
    border-radius: var(--radius);
}

.config-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
}

.config-label {
    color: var(--text-muted);
}

.config-value {
    color: var(--accent-dark);
    font-weight: 600;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.price-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-accent);
}

.price-card.featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(22, 119, 255, 0.04), var(--bg-card));
    box-shadow: 0 4px 24px rgba(22, 119, 255, 0.1);
}

.price-card.featured:hover {
    box-shadow: 0 8px 40px rgba(22, 119, 255, 0.15);
}

.featured-badge {
    position: absolute;
    top: 16px;
    right: -28px;
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 32px;
    transform: rotate(45deg);
    letter-spacing: 1px;
}

.price-badge-region {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.region-avail {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 3px;
    letter-spacing: 0.3px;
}

.region-avail-full {
    background: rgba(82, 196, 26, 0.08);
    color: #389e0d;
    border: 1px solid rgba(82, 196, 26, 0.2);
}

.region-avail-partial {
    background: rgba(250, 140, 22, 0.08);
    color: #d46b08;
    border: 1px solid rgba(250, 140, 22, 0.2);
}

.price-name {
    font-family: var(--font-cn);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
}

.price-type {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.price-specs {
    margin-bottom: 16px;
    flex: 1;
}

.price-specs li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
}

.price-specs li:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--text-muted);
    font-size: 0.82rem;
}

.spec-value {
    font-weight: 500;
    color: var(--text);
}

.price-tag {
    font-size: 0.82rem;
    color: var(--warning);
    background: rgba(250, 140, 22, 0.08);
    border: 1px solid rgba(250, 140, 22, 0.15);
    border-radius: 6px;
    padding: 8px 12px;
    margin-bottom: 16px;
    text-align: center;
}

.price-small {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 12px;
}

.price-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-dark);
    margin-bottom: 4px;
}

.price-annual {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    background: #fff7e6;
    border: 1px solid rgba(250, 140, 22, 0.2);
    border-radius: 4px;
    padding: 6px 10px;
    text-align: center;
}

.annual-price {
    font-weight: 700;
    color: #d4380d;
}

.annual-save {
    display: inline-block;
    background: #fff1f0;
    color: #cf1322;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: 4px;
}

.price-currency {
    font-size: 1.2rem;
    font-weight: 600;
    vertical-align: top;
    margin-right: 2px;
}

.price-period {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-muted);
}

.price-card .btn {
    width: 100%;
    margin-top: auto;
}

.pricing-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: rgba(250, 140, 22, 0.06);
    border: 1px solid rgba(250, 140, 22, 0.12);
    border-radius: var(--radius);
    padding: 16px 24px;
}

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pricing-config-bar {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
    .region-tabs {
        flex-direction: column;
    }
    .region-group {
        gap: 6px;
    }
    .node-chip {
        font-size: 0.76rem;
        padding: 5px 10px;
    }
}

@media (max-width: 580px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto 40px;
    }
}

/* ============================
   附加服务
   ============================ */

.addons-section {
    padding-bottom: 40px;
    background: var(--bg-secondary);
}

.addons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.addon-card {
    position: relative;
    min-height: 260px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    background-image: var(--bg-img);
    background-size: cover;
    background-position: center;
    transition: transform 0.4s cubic-bezier(.25,.46,.45,.94), box-shadow 0.4s ease;
}

.addon-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.65) 100%);
    transition: background 0.4s ease;
    z-index: 1;
}

.addon-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0,0,0,0.2);
}

.addon-card:hover::before {
    background: linear-gradient(180deg, rgba(22,119,255,0.15) 0%, rgba(0,0,0,0.75) 100%);
}

.addon-card:hover .addon-overlay h3 {
    transform: translateY(-2px);
}

.addon-card:hover .addon-overlay p {
    opacity: 1;
    transform: translateY(0);
    max-height: 100px;
}

.addon-card:hover .addon-price {
    opacity: 1;
    transform: translateY(0);
}

.addon-overlay {
    position: relative;
    z-index: 2;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    min-height: 260px;
    color: #fff;
}

.addon-tag {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: rgba(22, 119, 255, 0.85);
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
}

.addon-overlay h3 {
    font-family: var(--font-cn);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #fff;
    transition: transform 0.3s ease;
}

.addon-overlay p {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 14px;
    line-height: 1.6;
    opacity: 0.85;
    transform: translateY(4px);
    transition: all 0.35s ease;
}

.addon-price {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 6px 14px;
    border-radius: 6px;
    display: inline-block;
    align-self: flex-start;
    opacity: 0.9;
    transform: translateY(4px);
    transition: all 0.35s ease;
}

@media (max-width: 768px) {
    .addons-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

/* ============================
   核心优势
   ============================ */

.advantages-section {
    background: var(--bg-secondary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.advantage-card {
    position: relative;
    min-height: 220px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: default;
    background-image: var(--bg-img);
    background-size: cover;
    background-position: center;
    transition: transform 0.4s cubic-bezier(.25,.46,.45,.94), box-shadow 0.4s ease;
}

.advantage-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.6) 100%);
    transition: background 0.4s ease;
    z-index: 1;
}

.advantage-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0,0,0,0.2);
}

.advantage-card:hover::before {
    background: linear-gradient(180deg, rgba(22,119,255,0.12) 0%, rgba(0,0,0,0.72) 100%);
}

.advantage-card:hover .adv-overlay h3 {
    transform: translateY(-2px);
}

.advantage-card:hover .adv-overlay p {
    opacity: 1;
    transform: translateY(0);
}

.advantage-card:hover .adv-footnote {
    opacity: 1;
    max-height: 100px;
}

.adv-overlay {
    position: relative;
    z-index: 2;
    padding: 24px 22px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    min-height: 220px;
    color: #fff;
}

.adv-overlay h3 {
    font-family: var(--font-cn);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: #fff;
    transition: transform 0.3s ease;
}

.adv-overlay p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.85);
    line-height: 1.6;
    margin-bottom: 10px;
    opacity: 0.85;
    transform: translateY(4px);
    transition: all 0.35s ease;
}

.adv-footnote {
    font-size: 0.75rem !important;
    color: rgba(255,255,255,0.55) !important;
    font-style: italic;
    border-top: 1px dashed rgba(255,255,255,0.15);
    padding-top: 10px;
    margin-bottom: 0 !important;
    opacity: 0.7;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

@media (max-width: 900px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 580px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================
   数据中心
   ============================ */

.datacenter-section {
    background: var(--bg-primary);
}

.dc-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.dc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s ease;
}

.dc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.dc-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-bottom: 12px;
}

.dc-dot-green {
    background: var(--success);
    box-shadow: 0 0 8px rgba(82, 196, 26, 0.4);
    animation: pulse-green 2s ease-in-out infinite;
}

.dc-dot-yellow {
    background: var(--warning);
    box-shadow: 0 0 8px rgba(250, 140, 22, 0.4);
    animation: pulse-yellow 2s ease-in-out infinite;
}

.dc-dot-red {
    background: var(--danger);
    box-shadow: 0 0 8px rgba(245, 34, 45, 0.4);
    animation: pulse-red 2s ease-in-out infinite;
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 8px rgba(82, 196, 26, 0.4); }
    50% { box-shadow: 0 0 16px rgba(82, 196, 26, 0.7); }
}

@keyframes pulse-yellow {
    0%, 100% { box-shadow: 0 0 8px rgba(250, 140, 22, 0.4); }
    50% { box-shadow: 0 0 16px rgba(250, 140, 22, 0.7); }
}

@keyframes pulse-red {
    0%, 100% { box-shadow: 0 0 8px rgba(245, 34, 45, 0.4); }
    50% { box-shadow: 0 0 16px rgba(245, 34, 45, 0.7); }
}

.dc-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}

.dc-flag {
    width: 48px;
    height: 34px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.dc-header-text {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 8px;
}

.dc-header-text .dc-dot {
    flex-shrink: 0;
}

.dc-header-text h3 {
    margin: 0;
}

.dc-region-tag {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-heading);
    letter-spacing: 0.3px;
    flex-basis: 100%;
}

.dc-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
    color: var(--text);
}

.dc-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.dc-comment {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 8px;
}

.dc-latency {
    font-size: 0.75rem;
    color: var(--accent);
    font-family: var(--font-heading);
}

@media (max-width: 900px) {
    .dc-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 580px) {
    .dc-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================
   客户评价
   ============================ */

.reviews-section {
    background: var(--bg-secondary);
    overflow: hidden;
}

.reviews-marquee {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 10px 0 30px;
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
}

.marquee-track {
    display: flex;
    gap: 20px;
    width: max-content;
    animation: marqueeScroll 80s linear infinite;
}

.reviews-marquee:hover .marquee-track {
    animation-play-state: paused;
}

@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.marquee-card {
    width: 380px;
    min-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    cursor: default;
}

.marquee-card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.marquee-card .review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.marquee-card .review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    flex-shrink: 0;
}

.marquee-card .review-stars {
    color: var(--warning);
    font-size: 0.85rem;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.marquee-card h4 {
    font-family: var(--font-cn);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
}

.marquee-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.75;
    flex: 1;
}

@media (max-width: 768px) {
    .marquee-card {
        width: 300px;
        min-width: 300px;
        padding: 20px;
    }
    .marquee-track {
        gap: 14px;
    }
}

/* ============================
   SLA
   ============================ */

.sla-section {
    background: var(--bg-primary);
}

.sla-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.sla-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.sla-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.sla-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 12px;
}

.sla-item h3 {
    font-family: var(--font-cn);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.sla-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.sla-fine {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    border-top: 1px dashed var(--border);
    padding-top: 12px;
    line-height: 1.5;
}

@media (max-width: 900px) {
    .sla-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 580px) {
    .sla-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================
   关于我们
   ============================ */

.about-section {
    background: var(--bg-secondary);
}

.about-intro {
    max-width: 700px;
    margin: 0 auto 60px;
    text-align: center;
}

.about-intro p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-intro strong {
    color: var(--accent);
    font-weight: 700;
}

.about-lead {
    font-size: 1.02rem;
    line-height: 2;
}

.about-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 16px;
}

.about-list li {
    position: relative;
    padding: 6px 0 6px 24px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.about-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.team-avatar-img {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 20px;
    border: 3px solid var(--border);
    background: var(--bg-secondary);
}

.team-card h3 {
    font-family: var(--font-cn);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
}

.team-role {
    font-size: 0.82rem;
    color: var(--accent);
    display: block;
    margin-bottom: 16px;
}

.team-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.7;
    text-align: left;
}

@media (max-width: 768px) {
    .team-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* ============================
   CTA
   ============================ */

.cta-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.cta-inner {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--accent-bg), rgba(22, 119, 255, 0.03));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
}

.cta-inner h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.cta-inner p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1rem;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.cta-note {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 16px;
}

/* ============================
   Footer
   ============================ */

.footer {
    background: #1d2129;
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
    color: #c9cdd4;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 48px;
}

.footer-col h4 {
    font-family: var(--font-cn);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #ffffff;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: #86909c;
    padding: 4px 0;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--accent-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-social {
    font-size: 1.5rem;
    margin-bottom: 20px;
    letter-spacing: 16px;
}

.footer-bottom p {
    font-size: 0.78rem;
    color: #86909c;
    line-height: 1.8;
}

.footer-disclaimer {
    color: var(--warning) !important;
    margin-top: 8px;
    font-weight: 500;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================
   滚动显示动画
   ============================ */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================
   全局动画
   ============================ */

body {
    animation: pageIn 0.8s ease-out;
}

@keyframes pageIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f5f7fa;
}

::-webkit-scrollbar-thumb {
    background: #c9cdd4;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Selection */
::selection {
    background: var(--accent);
    color: #fff;
}