/* ==========================================================================
   冷钱包官网 - 全局样式
   配色方案：深蓝/黑色底 + 金色/青色点缀（专业加密货币风格）
   ========================================================================== */

/* CSS 变量 - 主题配色 */
:root {
    --color-primary: #0a1628;
    --color-primary-dark: #050d1a;
    --color-secondary: #1a2b4a;
    --color-accent: #f0b90b;
    --color-accent-hover: #d4a10a;
    --color-accent-light: #ffd666;
    --color-cyan: #00d4ff;
    --color-text: #e8ecf1;
    --color-text-light: #a0aec0;
    --color-text-muted: #718096;
    --color-bg: #0a1628;
    --color-bg-alt: #111d35;
    --color-bg-card: #1a2b4a;
    --color-border: #2d3e5f;
    --color-success: #48bb78;
    --color-warning: #ed8936;
    --color-error: #f56565;
    --color-gradient-1: linear-gradient(135deg, #f0b90b 0%, #d4a10a 100%);
    --color-gradient-2: linear-gradient(135deg, #0a1628 0%, #1a2b4a 100%);
    --color-gradient-hero: linear-gradient(135deg, rgba(10, 22, 40, 0.95) 0%, rgba(26, 43, 74, 0.9) 50%, rgba(10, 22, 40, 0.95) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-accent: 0 4px 20px rgba(240, 185, 11, 0.3);
    --shadow-cyan: 0 4px 20px rgba(0, 212, 255, 0.3);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   重置与基础样式
   ========================================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ==========================================================================
   通用容器与布局
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-sm {
    padding: 48px 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-title-accent {
    color: var(--color-accent);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
}

.section-header {
    margin-bottom: 56px;
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 32px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

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

.text-right {
    text-align: right;
}

/* ==========================================================================
   导航栏 / Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(45, 62, 95, 0.5);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(5, 13, 26, 0.95);
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.nav-brand-icon {
    width: 40px;
    height: 40px;
    background: var(--color-gradient-1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 800;
}

.nav-brand-text {
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    position: relative;
    padding: 10px 18px;
    color: var(--color-text-light);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
    background: rgba(240, 185, 11, 0.1);
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--color-gradient-1);
    border-radius: 1px;
}

.nav-cta {
    padding: 10px 24px;
    background: var(--color-gradient-1);
    color: var(--color-primary);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: transparent;
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    margin: 0 auto;
    transition: var(--transition);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-toggle span:nth-child(1) {
    top: 14px;
}

.nav-toggle span:nth-child(2) {
    top: 21px;
}

.nav-toggle span:nth-child(3) {
    top: 28px;
}

.nav-toggle.active span:nth-child(1) {
    top: 21px;
    transform: translateX(-50%) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    top: 21px;
    transform: translateX(-50%) rotate(-45deg);
}

/* ==========================================================================
   Hero 主视觉区域
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--color-gradient-hero);
    z-index: 1;
}

.hero-bg-image {
    position: absolute;
    inset: 0;
    object-fit: cover;
    opacity: 0.15;
    z-index: 0;
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 1;
}

.hero-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0.4;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.4;
    }
    50% {
        transform: translateY(-30px) translateX(20px);
        opacity: 0.8;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(240, 185, 11, 0.1);
    border: 1px solid rgba(240, 185, 11, 0.3);
    border-radius: 100px;
    color: var(--color-accent);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease-out;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-title-highlight {
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
    max-width: 560px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-gradient-1);
    color: var(--color-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
    color: var(--color-primary);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.05rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 64px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 4px;
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40%;
    max-width: 520px;
    z-index: 2;
    animation: fadeInRight 1s ease-out 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translate(30px, -50%);
    }
    to {
        opacity: 1;
        transform: translate(0, -50%);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==========================================================================
   核心特性区域
   ========================================================================== */
.features {
    background: var(--color-bg);
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-gradient-1);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(240, 185, 11, 0.4);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 24px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--color-gradient-1);
    transform: scale(1.1);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================================================
   服务介绍区域
   ========================================================================== */
.services {
    background: var(--color-bg-alt);
}

.service-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 80px;
}

.service-item:last-child {
    margin-bottom: 0;
}

.service-item.reverse {
    direction: rtl;
}

.service-item.reverse > * {
    direction: ltr;
}

.service-content {
    max-width: 520px;
}

.service-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 12px;
    letter-spacing: 0.1em;
}

.service-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.service-desc {
    color: var(--color-text-light);
    margin-bottom: 24px;
    line-height: 1.8;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
}

.service-list-icon {
    width: 24px;
    height: 24px;
    background: rgba(240, 185, 11, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.service-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.service-image:hover img {
    transform: scale(1.05);
}

.service-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.15) 0%, transparent 100%);
    pointer-events: none;
}

/* ==========================================================================
   产品展示区域
   ========================================================================== */
.products {
    background: var(--color-bg);
}

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

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(240, 185, 11, 0.4);
}

.product-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: var(--color-gradient-1);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.product-body {
    padding: 28px;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.product-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.product-feature {
    padding: 4px 12px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--color-accent);
}

.product-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent);
}

.product-cta {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.product-cta:hover {
    background: var(--color-accent);
    color: var(--color-primary);
}

/* ==========================================================================
   为什么选择我们
   ========================================================================== */
.why-us {
    background: var(--color-bg-alt);
}

.why-item {
    text-align: center;
    padding: 32px 24px;
}

.why-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.why-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.why-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ==========================================================================
   支持的币种
   ========================================================================== */
.coins {
    background: var(--color-bg);
}

.coin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 16px;
}

.coin-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.coin-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.coin-icon {
    width: 48px;
    height: 48px;
    background: var(--color-gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-weight: 800;
    font-size: 0.9rem;
}

.coin-name {
    font-size: 0.8rem;
    color: var(--color-text-light);
    font-weight: 500;
}

/* ==========================================================================
   使用步骤
   ========================================================================== */
.steps {
    background: var(--color-bg-alt);
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 64px;
    height: 64px;
    background: var(--color-gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin: 0 auto 24px;
    position: relative;
    z-index: 2;
}

.step-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.step-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 240px;
    margin: 0 auto;
}

.step-connector {
    position: absolute;
    top: 32px;
    left: calc(50% + 40px);
    right: calc(-50% + 40px);
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-border) 100%);
    z-index: 1;
}

.step-item:last-child .step-connector {
    display: none;
}

/* ==========================================================================
   常见问题 FAQ
   ========================================================================== */
.faq {
    background: var(--color-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-icon {
    width: 28px;
    height: 28px;
    background: rgba(240, 185, 11, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}

.faq-icon::before {
    content: '+';
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent);
    transition: var(--transition);
}

.faq-item.active .faq-icon::before {
    content: '−';
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 24px 24px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ==========================================================================
   客户评价
   ========================================================================== */
.testimonials {
    background: var(--color-bg-alt);
}

.testimonial-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.testimonial-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.testimonial-rating {
    color: var(--color-accent);
    margin-bottom: 16px;
    font-size: 1rem;
    letter-spacing: 2px;
}

.testimonial-text {
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

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

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-weight: 700;
}

.testimonial-name {
    font-weight: 600;
    color: var(--color-text);
}

.testimonial-title {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* ==========================================================================
   行动号召 CTA
   ========================================================================== */
.cta {
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 80px 24px;
}

.cta-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--color-text);
}

.cta-title-highlight {
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-desc {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 560px;
    margin: 0 auto 40px;
}

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

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.footer {
    background: var(--color-primary-dark);
    border-top: 1px solid var(--color-border);
    padding-top: 72px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand-desc {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 24px;
    max-width: 340px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-size: 1rem;
    transition: var(--transition);
}

.footer-social-link:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    color: var(--color-text-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

.footer-legal a {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

/* ==========================================================================
   内部页面 - Banner
   ========================================================================== */
.page-banner {
    position: relative;
    padding: 160px 0 100px;
    text-align: center;
    overflow: hidden;
    background: var(--color-gradient-2);
}

.page-banner-bg {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    z-index: 0;
}

.page-banner-content {
    position: relative;
    z-index: 2;
}

.page-banner-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--color-text);
}

.page-banner-desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 560px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-light);
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

.breadcrumb-sep {
    color: var(--color-border);
}

/* ==========================================================================
   新闻列表页
   ========================================================================== */
.news-list {
    background: var(--color-bg);
}

.news-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
    transition: var(--transition);
}

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

.news-card-image {
    height: 100%;
    min-height: 220px;
    overflow: hidden;
}

.news-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.news-card:hover .news-card-image img {
    transform: scale(1.08);
}

.news-card-body {
    padding: 28px 32px;
    display: flex;
    flex-direction: column;
}

.news-card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.news-card-category {
    padding: 4px 12px;
    background: rgba(240, 185, 11, 0.1);
    color: var(--color-accent);
    border-radius: 100px;
    font-weight: 500;
}

.news-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-card:hover .news-card-title {
    color: var(--color-accent);
}

.news-card-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-read {
    margin-top: 16px;
    color: var(--color-accent);
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.news-card-read::after {
    content: '→';
    transition: var(--transition);
}

.news-card-read:hover::after {
    transform: translateX(4px);
}

/* 新闻详情页 */
.news-detail {
    background: var(--color-bg);
}

.news-detail-article {
    max-width: 820px;
    margin: 0 auto;
}

.news-detail-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.news-detail-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 32px;
    color: var(--color-text);
}

.news-detail-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.news-detail-content {
    color: var(--color-text);
    line-height: 1.9;
    font-size: 1.025rem;
}

.news-detail-content p {
    margin-bottom: 20px;
}

.news-detail-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 40px 0 20px;
    color: var(--color-text);
}

.news-detail-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 32px 0 16px;
    color: var(--color-text);
}

.news-detail-content ul {
    padding-left: 24px;
    margin-bottom: 20px;
}

.news-detail-content li {
    list-style: disc;
    margin-bottom: 8px;
    color: var(--color-text-light);
}

.news-detail-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--color-bg-card);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--color-text-light);
}

/* ==========================================================================
   联系页
   ========================================================================== */
.contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-form {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: var(--transition);
    font-size: 0.95rem;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(240, 185, 11, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    transition: var(--transition);
}

.contact-info-item:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-info-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--color-text);
}

.contact-info-text {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ==========================================================================
   关于页
   ========================================================================== */
.about-content {
    background: var(--color-bg);
}

.about-text-block {
    margin-bottom: 48px;
}

.about-text-block p {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 1rem;
    margin-bottom: 16px;
}

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

.team-card {
    text-align: center;
    padding: 32px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.team-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--color-gradient-1);
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.team-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.team-role {
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 500;
}

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

.value-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.value-card:hover {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(240, 185, 11, 0.05) 100%);
    border-color: var(--color-accent);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.value-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.value-desc {
    color: var(--color-text-light);
    font-size: 0.875rem;
    line-height: 1.7;
}

/* ==========================================================================
   返回顶部
   ========================================================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.25rem;
    box-shadow: var(--shadow-accent);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
}

/* ==========================================================================
   滚动动画可见状态
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ==========================================================================
   响应式 - 平板
   ========================================================================== */
@media (max-width: 1024px) {
    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }

    .hero-visual {
        position: relative;
        width: 100%;
        max-width: 420px;
        margin: 48px auto 0;
        top: auto;
        transform: none;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
        margin: 0 auto;
    }

    .hero-desc {
        margin: 0 auto 40px;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .service-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .service-item.reverse {
        direction: ltr;
    }

    .service-content {
        max-width: 100%;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .news-card {
        grid-template-columns: 220px 1fr;
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .steps .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .step-connector {
        display: none;
    }
}

/* ==========================================================================
   响应式 - 手机
   ========================================================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(5, 13, 26, 0.98);
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        border-top: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        padding: 14px 20px;
    }

    .nav-toggle {
        display: block;
    }

    .section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .hero-stat-value {
        font-size: 1.375rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .features .grid-3 {
        grid-template-columns: 1fr;
    }

    .news-card {
        grid-template-columns: 1fr;
    }

    .news-card-image {
        height: 180px;
        min-height: auto;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .cta-content {
        padding: 56px 16px;
    }

    .page-banner {
        padding: 140px 0 72px;
    }

    .team-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 24px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .coin-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

    .team-grid {
        grid-template-columns: 1fr;
    }

    .coin-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* ==========================================================================
   打印样式
   ========================================================================== */
@media print {
    .header,
    .footer,
    .nav-toggle,
    .back-to-top,
    .hero-visual {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* ==========================================================================
   减少动画偏好
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}