:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-card-hover: #f1f5f9;
    --color-bg-nav: rgba(255, 255, 255, 0.8);
    --color-bg-footer: #f1f5f9;
    --color-bg-footer-text: #64748b;
    --color-bg-footer-border: #e2e8f0;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-primary: #0d9488;
    --color-primary-hover: #0f766e;
    --color-primary-light: rgba(13, 148, 136, 0.1);
    --color-primary-glow: rgba(13, 148, 136, 0.3);
    --color-secondary: #0891b2;
    --color-rainyun: #3b82f6;
    --color-rainyun-light: rgba(59, 130, 246, 0.1);
    --color-rainyun-glow: rgba(59, 130, 246, 0.3);
    --color-aliyun: #f97316;
    --color-aliyun-light: rgba(249, 115, 22, 0.1);
    --color-aliyun-glow: rgba(249, 115, 22, 0.3);
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
    --font-coupon: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", monospace;
}

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&display=swap');

[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-bg-card: #1e293b;
    --color-bg-card-hover: #334155;
    --color-bg-nav: rgba(15, 23, 42, 0.85);
    --color-bg-footer: #020617;
    --color-bg-footer-text: #64748b;
    --color-bg-footer-border: rgba(255, 255, 255, 0.1);
    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --color-primary: #2dd4bf;
    --color-primary-hover: #14b8a6;
    --color-primary-light: rgba(45, 212, 191, 0.15);
    --color-primary-glow: rgba(45, 212, 191, 0.25);
    --color-secondary: #22d3ee;
    --color-rainyun: #60a5fa;
    --color-rainyun-light: rgba(96, 165, 250, 0.15);
    --color-rainyun-glow: rgba(96, 165, 250, 0.2);
    --color-aliyun: #fb923c;
    --color-aliyun-light: rgba(251, 146, 60, 0.15);
    --color-aliyun-glow: rgba(251, 146, 60, 0.2);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: transparent;
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

img {
    max-width: 100%;
    display: block;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 320px;
}

.nav-logo:hover {
    color: var(--color-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after,
.nav-link:hover::after {
    width: 100%;
}

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

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    color: var(--color-primary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-primary);
    color: white;
}

[data-theme="light"] .icon-moon {
    display: none;
}

[data-theme="dark"] .icon-sun {
    display: none;
}

.nav-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.nav-menu-btn span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.nav-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 64px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-primary-glow), transparent),
        radial-gradient(ellipse 60% 40% at 80% 50%, var(--color-rainyun-glow), transparent),
        radial-gradient(ellipse 60% 40% at 20% 80%, var(--color-aliyun-glow), transparent);
    opacity: 0.6;
    transition: opacity var(--transition-slow);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-rainyun));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0);
    }
    10% {
        opacity: 0.6;
        transform: translateY(-20px) scale(1);
    }
    90% {
        opacity: 0.1;
        transform: translateY(-200px) scale(0.5);
    }
    100% {
        opacity: 0;
        transform: translateY(-250px) scale(0);
    }
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--color-primary-glow);
}

[data-theme="dark"] .btn-primary:not(.aliyun-btn) {
    background: #1aab9e;
}

[data-theme="dark"] .btn-primary:not(.aliyun-btn):hover {
    background: #149688;
}

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-card-hover);
    color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.0625rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.875rem;
}

.aliyun-btn {
    background: var(--color-aliyun);
    box-shadow: 0 2px 8px var(--color-aliyun-glow);
}

.aliyun-btn:hover {
    background: #ea580c;
    box-shadow: 0 4px 16px var(--color-aliyun-glow);
}

.section {
    padding: 100px 0;
    transition: background-color var(--transition-base);
    background: var(--color-bg);
    position: relative;
    z-index: 1;
}

.section:first-child {
    padding-top: 80px;
}

.hero-intro {
    position: relative;
    padding: 140px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: transparent;
}

.bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.hero-intro > .container {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-intro-content {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    z-index: 1;
}

.hero-intro-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.hero-intro-subtitle {
    font-size: clamp(1rem, 2vw, 1.1875rem);
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

.hero-intro-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.intro-card {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), border-color 0.3s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    will-change: transform;
}

.intro-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 48px -12px rgba(13, 148, 136, 0.14), 0 12px 24px -6px rgba(0, 0, 0, 0.07);
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    pointer-events: none;
    z-index: -1;
}

[data-theme="dark"] .intro-card {
    background: rgba(30, 41, 59, 0.85);
}

.intro-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.intro-card:first-child::before {
    background: linear-gradient(90deg, var(--color-rainyun), var(--color-primary));
}

.intro-card:last-child::before {
    background: linear-gradient(90deg, var(--color-aliyun), #fbbf24);
}

.intro-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary-glow);
}

.intro-card:hover::after {
    opacity: 1;
}

.intro-card:hover::before {
    opacity: 1;
}

.intro-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.intro-card-logo {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    object-fit: contain;
    flex-shrink: 0;
}

.intro-card-name {
    font-size: 1.375rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.intro-card-badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: 100px;
}

.intro-card-badge.rainyun-badge {
    background: var(--color-rainyun-light);
    color: var(--color-rainyun);
}

.intro-card-badge.aliyun-badge {
    background: var(--color-aliyun-light);
    color: var(--color-aliyun);
}

.intro-card-desc {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.intro-card-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.intro-highlight {
    display: inline-block;
    padding: 4px 14px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
    background: var(--color-rainyun-light);
    color: var(--color-rainyun);
}

.intro-highlight.aliyun-highlight {
    background: var(--color-aliyun-light);
    color: var(--color-aliyun);
}

.intro-card-btn {
    width: 100%;
    justify-content: center;
}

.section-alt {
    background: var(--color-bg-alt);
}

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

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: 100px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.aliyun-badge {
    background: var(--color-aliyun-light);
    color: var(--color-aliyun);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.promo-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), border-color 0.3s ease;
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.promo-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 48px -12px rgba(13, 148, 136, 0.14), 0 12px 24px -6px rgba(0, 0, 0, 0.07);
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    pointer-events: none;
    z-index: -1;
}

.promo-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.promo-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary-glow);
}

.promo-card:hover::after {
    opacity: 1;
}

.promo-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.rainyun-icon {
    background: var(--color-rainyun-light);
    color: var(--color-rainyun);
}

.aliyun-icon {
    background: var(--color-aliyun-light);
    color: var(--color-aliyun);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    padding-top: 12px;
}

.card-desc {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.card-highlight {
    display: flex;
    gap: 8px;
}

.highlight-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    letter-spacing: 0.02em;
}

.highlight-tag.hot {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.highlight-tag.best {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.highlight-tag.service {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.highlight-tag.cashback {
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
}

.highlight-tag.enterprise {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.highlight-tag.student {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.highlight-tag.new {
    background: rgba(249, 115, 22, 0.1);
    color: #f97316;
}

.coupon-section {
    margin-bottom: 48px;
}

.coupon-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg-card);
    border: 2px dashed var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 24px 32px;
    gap: 24px;
    transition: all var(--transition-base);
}

.coupon-card:hover {
    border-color: var(--color-primary-hover);
    box-shadow: 0 0 0 4px var(--color-primary-light);
}

.coupon-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.coupon-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.coupon-code {
    font-family: var(--font-coupon);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.05em;
    user-select: all;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-card);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-copy:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-copy.copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.cta-section {
    text-align: center;
}

.cta-note {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.compare-table {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    border-bottom: 1px solid var(--color-border);
}

.compare-row:last-child {
    border-bottom: none;
}

.compare-header {
    background: var(--color-primary-light);
}

.compare-header .compare-cell {
    font-weight: 700;
    color: var(--color-primary);
}

.compare-footer {
    background: var(--color-bg-alt);
}

.compare-cell {
    padding: 16px 24px;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.compare-cell:not(:last-child) {
    border-right: 1px solid var(--color-border);
}

.highlight-cell {
    font-weight: 600;
    color: var(--color-primary);
}

.platform-logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.platform-logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: contain;
    flex-shrink: 0;
}

.product-types {
    text-align: center;
    margin-bottom: 48px;
    padding: 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.product-types-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.product-tag {
    display: inline-block;
    padding: 6px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: 100px;
    background: var(--color-rainyun-light);
    color: var(--color-rainyun);
    transition: all var(--transition-fast);
}

.product-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.product-tag.highlight {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-rainyun-light));
    color: var(--color-primary);
    border: 1px solid var(--color-primary-glow);
}

.product-tag.aliyun-tag {
    background: linear-gradient(135deg, var(--color-aliyun-light), rgba(249, 115, 22, 0.2));
    color: var(--color-aliyun);
    font-size: 0.9375rem;
    padding: 8px 24px;
    border: 1px solid var(--color-aliyun-glow);
}

.product-types-detail {
    margin-top: 16px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.compare-toolbar {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.compare-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.filter-btn {
    padding: 6px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.compare-platform {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
}

.compare-logo {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    object-fit: contain;
}

.sortable {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: center;
}

.sortable:hover {
    color: var(--color-primary);
}

.sort-icon {
    opacity: 0.4;
    transition: opacity var(--transition-fast);
}

.sortable:hover .sort-icon {
    opacity: 1;
}

.system-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}

.system-tag {
    display: inline-block;
    padding: 3px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: 6px;
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.system-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.system-tag.aliyun-sys {
    background: var(--color-aliyun-light);
    color: var(--color-aliyun);
    border-color: transparent;
}

.compare-row.hidden {
    display: none;
}

.footer-filing {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--color-bg-footer-text);
}

.footer-filing a {
    color: var(--color-bg-footer-text);
    transition: color var(--transition-fast);
}

.footer-filing a:hover {
    color: #f1f5f9;
}

.filing-divider {
    margin: 0 8px;
    opacity: 0.5;
}

.footer {
    background: var(--color-bg-footer);
    color: var(--color-bg-footer-text);
    padding: 48px 0 32px;
    transition: background-color var(--transition-base);
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-bg-footer-border);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
    display: block;
}

.footer-desc {
    font-size: 0.875rem;
    color: var(--color-bg-footer-text);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--color-bg-footer-text);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-bg-footer-text);
}

.footer-bottom a {
    color: var(--color-primary);
}

.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: var(--color-bg);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
    z-index: 9999;
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

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

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@media (max-width: 768px) {
    .nav-logo {
        font-size: 1rem;
        max-width: 200px;
    }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg-nav);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-menu-btn {
        display: flex;
    }

    .hero-intro {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-intro-content {
        margin-bottom: 32px;
    }

    .hero-intro-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .intro-card {
        padding: 20px;
    }

    .intro-card-header {
        gap: 12px;
    }

    .intro-card-logo {
        width: 40px;
        height: 40px;
    }

    .intro-card-name {
        font-size: 1.125rem;
    }

    .intro-card-desc {
        font-size: 0.875rem;
    }

    .intro-card-highlights {
        gap: 6px;
    }

    .intro-highlight {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .intro-card-btn {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .section {
        padding: 60px 0;
    }

    .section:first-child {
        padding-top: 60px;
    }

    .section-header {
        margin-bottom: 36px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-desc {
        font-size: 0.9rem;
    }

    .platform-logo {
        width: 24px;
        height: 24px;
    }

    .platform-logo-area {
        gap: 8px;
    }

    .product-types {
        padding: 16px;
        margin-bottom: 32px;
    }

    .product-tags {
        gap: 6px;
    }

    .product-tag {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .product-types-detail {
        font-size: 0.8125rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .promo-card {
        padding: 20px;
    }

    .card-title {
        font-size: 1.0625rem;
    }

    .card-desc {
        font-size: 0.875rem;
    }

    .coupon-card {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .coupon-left {
        flex-direction: column;
        align-items: center;
    }

    .coupon-code {
        font-size: 1.25rem;
    }

    .cta-section {
        margin-top: 24px;
    }

    .cta-note {
        font-size: 0.8125rem;
    }

    .compare-toolbar {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .compare-filter {
        gap: 6px;
        flex-wrap: nowrap;
        min-width: max-content;
    }

    .filter-btn {
        padding: 5px 12px;
        font-size: 0.75rem;
    }

    .compare-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .compare-row {
        font-size: 0.8125rem;
        min-width: 500px;
    }

    .compare-cell {
        padding: 12px 8px;
    }

    .system-tags {
        gap: 4px;
    }

    .system-tag {
        font-size: 0.625rem;
        padding: 2px 8px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .footer-filing {
        justify-content: center;
    }

    .toast {
        bottom: 20px;
        left: 16px;
        right: 16px;
    }
}

@media (max-width: 480px) {
    .nav-logo {
        font-size: 0.875rem;
        max-width: 160px;
    }

    .logo-icon {
        font-size: 1.125rem;
    }

    .container {
        padding: 0 16px;
    }

    .hero-intro {
        padding: 80px 0 40px;
    }

    .hero-intro-title {
        font-size: 1.75rem;
    }

    .hero-intro-subtitle {
        font-size: 0.9375rem;
    }

    .intro-card {
        padding: 16px;
    }

    .intro-card-logo {
        width: 36px;
        height: 36px;
    }

    .intro-card-name {
        font-size: 1rem;
    }

    .intro-card-badge {
        font-size: 0.6875rem;
    }

    .intro-card-desc {
        font-size: 0.8125rem;
        -webkit-line-clamp: 2;
    }

    .intro-highlight {
        font-size: 0.6875rem;
        padding: 3px 8px;
    }

    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .section-desc {
        font-size: 0.8125rem;
    }

    .btn-lg {
        padding: 12px 24px;
        font-size: 0.9375rem;
    }

    .btn-sm {
        padding: 6px 14px;
        font-size: 0.8125rem;
    }

    .promo-card {
        padding: 16px;
    }

    .card-icon {
        width: 40px;
        height: 40px;
    }

    .card-icon svg {
        width: 20px;
        height: 20px;
    }

    .card-title {
        font-size: 1rem;
    }

    .card-desc {
        font-size: 0.8125rem;
    }

    .highlight-tag {
        font-size: 0.6875rem;
        padding: 3px 10px;
    }

    .coupon-code {
        font-size: 1.125rem;
    }

    .product-types {
        padding: 12px;
    }

    .product-tag {
        font-size: 0.6875rem;
        padding: 3px 8px;
    }

    .compare-row {
        grid-template-columns: 1fr;
    }

    .compare-cell:not(:last-child) {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .compare-header {
        display: none;
    }

    .footer-logo {
        font-size: 0.9375rem;
    }

    .footer-desc {
        font-size: 0.8125rem;
    }
}