/* ========================================
   声誉保门户网站 - 专业大气风格
   ======================================== */

/* CSS 变量定义 */
:root {
    /* 品牌色 */
    --brand-start: #3B82F6;
    --brand-end: #1D4ED8;
    --brand-gradient: linear-gradient(135deg, #3B82F6, #1D4ED8);
    --brand-light: #60A5FA;

    /* 功能色 */
    --color-accent: #F97316;
    --color-accent-text: #C2410C;
    --color-success: #10B981;

    /* 背景色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --bg-card: #FFFFFF;

    /* 文字色 */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --text-muted: #94A3B8;

    /* 边框 */
    --border-subtle: rgba(148, 163, 184, 0.2);
    --border-light: rgba(148, 163, 184, 0.4);

    /* 动画曲线 */
    --ease-smooth: cubic-bezier(0.32, 0.72, 0, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 尺寸 */
    --container-max: 1280px;
    --radius-xl: 1.5rem;
    --radius-lg: 1.25rem;
    --radius-md: 1rem;
    --radius-sm: 0.75rem;
    --radius-xs: 0.5rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
}

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

/* ========================================
   装饰性背景
   ======================================== */
.bg-decoration {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.bg-orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: float-slow 20s ease-in-out infinite;
}

.bg-orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.25) 0%, transparent 70%);
    bottom: 20%;
    left: -150px;
    animation: float-slow 25s ease-in-out infinite reverse;
}

@keyframes float-slow {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.05);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

/* 装饰形状容器 */
.bg-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

/* 装饰圆圈 */
.shape-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(59, 130, 246, 0.15);
    animation: float-slow 25s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 15%;
    left: 5%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 8%;
    border-color: rgba(59, 130, 246, 0.1);
    animation-delay: -8s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 15%;
    border-color: rgba(59, 130, 246, 0.08);
    animation-delay: -15s;
}

/* 装饰圆环 */
.shape-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px dashed rgba(59, 130, 246, 0.12);
    animation: spin-slow 60s linear infinite;
}

.shape-ring-1 {
    width: 400px;
    height: 400px;
    top: 5%;
    right: -5%;
}

.shape-ring-2 {
    width: 250px;
    height: 250px;
    bottom: 10%;
    left: -3%;
    animation-direction: reverse;
    animation-duration: 45s;
}

@keyframes spin-slow {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 装饰曲线 */
.shape-line {
    position: absolute;
    pointer-events: none;
}

.shape-line-1 {
    width: 300px;
    height: 300px;
    top: 25%;
    right: 15%;
    opacity: 0.6;
}

.shape-line-2 {
    width: 250px;
    height: 250px;
    bottom: 15%;
    left: 10%;
    opacity: 0.5;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: transform 0.35s var(--ease-smooth), box-shadow 0.3s ease;
}

.navbar-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.75rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all 0.3s var(--ease-smooth);
}

.nav-link:hover {
    color: var(--brand-end);
    background: rgba(59, 130, 246, 0.08);
}

/* 键盘焦点状态(WCAG 2.4.7) */
.btn:focus-visible,
.nav-link:focus-visible,
.footer-links a:focus-visible,
.trust-badge:focus-visible {
    outline: 2px solid var(--brand-end);
    outline-offset: 3px;
    border-radius: var(--radius-full);
}

.cta-section .btn:focus-visible {
    outline-color: #FFFFFF;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 6rem;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

/* Hero Badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--brand-end);
}

.badge-icon {
    width: 16px;
    height: 16px;
}

/* Hero Title */
.hero-title {
    font-size: clamp(4rem, 15vw, 6rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: 1.25rem;
    letter-spacing: -0.04em;
}

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

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 400;
    line-height: 1.8;
}

/* 统计数据 */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--brand-end);
    line-height: 1;
    letter-spacing: -0.02em;
}

.stat-suffix {
    font-size: 1.25rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 0.375rem;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-light);
}

/* CTA 按钮 */
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* 按钮基础样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
    text-decoration: none;
}

.btn-primary {
    background: var(--brand-gradient);
    color: white;
    box-shadow: var(--shadow-md), 0 4px 14px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 8px 24px rgba(59, 130, 246, 0.35);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: rgba(59, 130, 246, 0.08);
    color: var(--brand-end);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-1px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: transform 0.3s var(--ease-smooth);
}

.btn-arrow svg {
    width: 12px;
    height: 12px;
}

.btn:hover .btn-arrow {
    transform: translateX(3px);
}

.hero-note {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ========================================
   信任背书
   ======================================== */
.trust-section {
    padding: 3rem 2rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
}

/* 左侧光晕 */
.trust-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, transparent 60%);
    transform: translateY(-50%);
    pointer-events: none;
}

/* 右侧光晕 */
.trust-section::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, transparent 60%);
    transform: translateY(-50%);
    pointer-events: none;
}

.trust-title {
    text-align: center;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.trust-badges {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s var(--ease-smooth);
}

.trust-badge svg {
    width: 18px;
    height: 18px;
    color: var(--brand-end);
}

.trust-badge:hover {
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   功能展示区域
   ======================================== */
.features {
    padding: 6rem 2rem;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

/* 圆点网格背景 */
.features::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(59, 130, 246, 0.25) 1.5px, transparent 1.5px);
    background-size: 40px 40px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, black 10%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, black 10%, transparent 80%);
}

/* 右侧光晕 */
.features::after {
    content: '';
    position: absolute;
    top: 5%;
    right: -5%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, rgba(59, 130, 246, 0.08) 40%, transparent 70%);
    pointer-events: none;
}

/* 功能区装饰线条 */
.features .container {
    position: relative;
}

.features .container::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 10%;
    width: 200px;
    height: 200px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.features .container::after {
    content: '';
    position: absolute;
    bottom: -30px;
    right: 15%;
    width: 120px;
    height: 120px;
    border: 1px dashed rgba(59, 130, 246, 0.15);
    border-radius: 50%;
    pointer-events: none;
    animation: spin-slow 50s linear infinite;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--brand-end);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Bento Grid - 不等分布局 */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: auto;
    gap: 1.5rem;
}

.bento-card {
    position: relative;
}

/* 大卡片 - 侵权分析 */
.bento-large {
    grid-column: span 6;
}

/* 宽卡片 - 舆情报告 */
.bento-wide {
    grid-column: span 8;
}

/* 普通卡片 */
.bento-card:not(.bento-large):not(.bento-wide) {
    grid-column: span 3;
}

/* 卡片样式 */
.card-shell {
    position: relative;
    height: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all 0.4s var(--ease-smooth);
    overflow: hidden;
}

/* 顶部渐变光效 */
.card-shell::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand-gradient);
    opacity: 0;
    transition: opacity 0.4s var(--ease-smooth);
}

/* 底部阴影光效 */
.card-shell::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 60%;
    background: radial-gradient(ellipse at center bottom, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
    transition: opacity 0.4s var(--ease-smooth);
}

.bento-card:hover .card-shell {
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.bento-card:hover .card-shell::before {
    opacity: 1;
}

.bento-card:hover .card-shell::after {
    opacity: 1;
}

.card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.card-inner-horizontal {
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
}

.card-text {
    flex: 1;
}

.card-icon-wrapper {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-gradient);
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md), 0 4px 12px rgba(59, 130, 246, 0.2);
}

.card-icon {
    width: 28px;
    height: 28px;
    color: white;
}

.card-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

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

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1.5rem;
}

.tag {
    padding: 0.375rem 0.875rem;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--brand-end);
}

.card-tag-free {
    display: inline-block;
    margin-top: auto;
    padding: 0.375rem 0.875rem;
    background: rgba(249, 115, 22, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-text);
}

/* 卡片内视觉元素 */
.card-visual {
    margin-top: 1.5rem;
}

.mock-analysis {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 1rem;
    border: 1px solid var(--border-subtle);
}

.mock-header {
    display: flex;
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.mock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-light);
}

.mock-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mock-line {
    height: 8px;
    background: var(--border-subtle);
    border-radius: var(--radius-xs);
}

.mock-line-long {
    width: 90%;
}

.mock-line-medium {
    width: 70%;
}

.mock-line-short {
    width: 50%;
}

.mock-highlight {
    width: 80%;
    height: 8px;
    background: rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-xs);
    position: relative;
}

.mock-highlight::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 40%;
    height: 100%;
    background: var(--brand-gradient);
    border-radius: var(--radius-xs);
    opacity: 0.6;
}

.mock-chart {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    height: 80px;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.chart-bar {
    flex: 1;
    background: var(--brand-gradient);
    border-radius: var(--radius-xs) var(--radius-xs) 0 0;
    opacity: 0.6;
    transition: opacity 0.3s var(--ease-smooth);
}

.bento-card:hover .chart-bar {
    opacity: 1;
}

.chart-bar-1 { height: 40%; }
.chart-bar-2 { height: 65%; }
.chart-bar-3 { height: 45%; }
.chart-bar-4 { height: 80%; }
.chart-bar-5 { height: 55%; }

/* ========================================
   使用流程
   ======================================== */
.process {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

/* 渐变光带 */
.process::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 300px;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.12) 0%, transparent 100%);
    pointer-events: none;
}

/* 左侧大光晕 */
.process::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 40%, transparent 70%);
    pointer-events: none;
}

/* 流程区装饰 */
.process .container {
    position: relative;
}

.process .container::before {
    content: '';
    position: absolute;
    top: 20%;
    right: 5%;
    width: 150px;
    height: 150px;
    border: 1px solid rgba(59, 130, 246, 0.12);
    border-radius: 50%;
    pointer-events: none;
}

.process .container::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: 8%;
    width: 80px;
    height: 80px;
    border: 1px dashed rgba(59, 130, 246, 0.15);
    border-radius: 50%;
    pointer-events: none;
    animation: spin-slow 40s linear infinite reverse;
}

/* 装饰线条 SVG */
.process-timeline {
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -50px;
    width: 200px;
    height: 100px;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0,80 Q50,20 100,50 T200,30' fill='none' stroke='rgba(59,130,246,0.15)' stroke-width='1'/%3E%3Cpath d='M0,90 Q60,40 120,60 T200,45' fill='none' stroke='rgba(59,130,246,0.1)' stroke-width='1'/%3E%3C/svg%3E");
    pointer-events: none;
}

.process-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--brand-start), var(--brand-end));
    opacity: 0.15;
    transform: translateX(-50%);
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.step:nth-child(even) {
    flex-direction: row-reverse;
}

.step-marker {
    position: relative;
    flex-shrink: 0;
}

.step-number {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-gradient);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-lg), 0 8px 20px rgba(59, 130, 246, 0.25);
}

.step-pulse {
    position: absolute;
    inset: -8px;
    border: 2px solid var(--brand-light);
    border-radius: 50%;
    opacity: 0;
    animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.6;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.3);
    }
}

.step-content {
    flex: 1;
    max-width: 320px;
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s var(--ease-smooth);
}

.step:hover .step-content {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.step-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-sm);
}

.step-icon svg {
    width: 24px;
    height: 24px;
    color: var(--brand-end);
}

.step-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   底部 CTA
   ======================================== */
.cta-section {
    padding: 6rem 2rem;
    background: var(--brand-gradient);
    position: relative;
    overflow: hidden;
}

/* 装饰圆圈 */
.cta-section::before {
    content: '';
    position: absolute;
    top: -80px;
    left: -80px;
    width: 250px;
    height: 250px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    pointer-events: none;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    right: -50px;
    width: 300px;
    height: 300px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    color: white;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.cta-desc {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 2rem;
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background: white;
    color: var(--brand-end);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 3rem 2rem 2rem;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

/* 顶部渐变线条 */
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand-gradient);
    opacity: 0.5;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo {
    height: 36px;
    width: auto;
}

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

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.3s var(--ease-smooth);
}

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

.footer-copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.icp {
    margin-top: 0.25rem;
}

/* ========================================
   动画
   ======================================== */

/* 滚动入场动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 0.8s var(--ease-out),
        transform 0.8s var(--ease-out);
}

.reveal.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 延迟动画 */
.reveal:nth-child(1) { transition-delay: 0s; }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .bento-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .bento-large {
        grid-column: span 6;
    }

    .bento-wide {
        grid-column: span 6;
    }

    .bento-card:not(.bento-large):not(.bento-wide) {
        grid-column: span 3;
    }

    .timeline-line {
        display: none;
    }

    .step,
    .step:nth-child(even) {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .navbar-inner {
        justify-content: space-between;
    }

    .nav-logo {
        height: 28px;
    }

    .hero {
        padding: 7rem 1.5rem 4rem;
        min-height: auto;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 1.25rem;
        padding: 1.25rem 1.5rem;
    }

    .stat-divider {
        width: 60%;
        height: 1px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.875rem;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

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

    .bento-large,
    .bento-wide,
    .bento-card:not(.bento-large):not(.bento-wide) {
        grid-column: span 1;
    }

    .card-shell {
        padding: 1.5rem;
    }

    .card-inner-horizontal {
        flex-direction: column;
    }

    .trust-logos {
        gap: 1rem;
    }

    .trust-logo {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }

    .process-steps {
        gap: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-section .btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 3rem;
    }

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

    .step-number {
        width: 56px;
        height: 56px;
        font-size: 1.25rem;
    }

    .step-content {
        padding: 1.5rem;
    }
}

/* ========================================
   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;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ========================================
   无 JS 兜底:内容默认可见
   ======================================== */
@media (scripting: none) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}