/* ===== 小龙虾 OpenClaw 助手 - 主样式表 ===== */

:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --primary-light: #fadbd8;
    --accent: #f39c12;
    --accent-light: #fef9e7;
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-dark: #1a1a2e;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ffffff;
    --border: #e8e8e8;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-lg: 20px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26,26,46,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
    padding: 0;
}

.navbar.scrolled {
    border-bottom-color: rgba(255,255,255,0.1);
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 20px;
    color: var(--primary);
}

.lobster-icon { font-size: 28px; }

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link-special {
    text-decoration: none;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    transition: all 0.2s;
}

.nav-link-special:hover {
    background: rgba(231,76,60,0.2);
    color: #f5a0a0;
}

.nav-link-special.nav-active {
    background: var(--primary);
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: rgba(255,255,255,0.9);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #1a1a2e;
        padding: 16px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    .mobile-menu-btn { display: block; }
}

/* ===== 英雄区 ===== */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 140px 0 80px;
    overflow: hidden;
    color: var(--text-light);
}

.hero-bg-bubbles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    animation: float 15s infinite;
}

.bubble:nth-child(1) { width: 80px; height: 80px; top: 10%; left: 5%; animation-delay: 0s; }
.bubble:nth-child(2) { width: 120px; height: 120px; top: 20%; right: 10%; animation-delay: -3s; }
.bubble:nth-child(3) { width: 60px; height: 60px; top: 60%; left: 15%; animation-delay: -6s; }
.bubble:nth-child(4) { width: 100px; height: 100px; bottom: 20%; right: 20%; animation-delay: -9s; }
.bubble:nth-child(5) { width: 50px; height: 50px; top: 40%; left: 50%; animation-delay: -12s; }
.bubble:nth-child(6) { width: 90px; height: 90px; bottom: 10%; left: 30%; animation-delay: -2s; }

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.1); }
}

.hero-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 60px;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 580px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(231,76,60,0.2);
    border: 1px solid rgba(231,76,60,0.4);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    color: #f5a0a0;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 48px;
    line-height: 1.25;
    font-weight: 800;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, #e74c3c, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.btn-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(231,76,60,0.4);
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shine 2.5s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    color: rgba(255,255,255,0.8);
    border: 1px solid rgba(255,255,255,0.3);
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* 小龙虾动画 */
.hero-visual {
    flex-shrink: 0;
}

.lobster-mascot {
    position: relative;
    width: 280px;
    height: 280px;
}

.lobster-body {
    position: relative;
    width: 100%;
    height: 100%;
}

.lobster-head {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 60px;
    background: linear-gradient(180deg, #e74c3c, #c0392b);
    border-radius: 50% 50% 40% 40%;
}

.lobster-eye {
    position: absolute;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    top: 18px;
}

.lobster-eye::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: #1a1a2e;
    border-radius: 50%;
    top: 2px;
    left: 2px;
}

.lobster-eye.left { left: 16px; }
.lobster-eye.right { right: 16px; }

.lobster-antenna {
    position: absolute;
    width: 2px;
    height: 50px;
    background: #e74c3c;
    top: -30px;
    border-radius: 1px;
    transform-origin: bottom center;
}

.lobster-antenna.left { left: 20px; transform: rotate(-25deg); }
.lobster-antenna.right { right: 20px; transform: rotate(25deg); }

.lobster-tail {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.tail-segment {
    width: 60px;
    height: 20px;
    background: linear-gradient(180deg, #e74c3c, #c0392b);
    border-radius: 50%;
}

.tail-segment:nth-child(2) { width: 50px; }
.tail-segment:nth-child(3) { width: 40px; }

.tail-fan {
    width: 70px;
    height: 30px;
    background: #e74c3c;
    border-radius: 0 0 50% 50%;
    margin-top: -2px;
}

.lobster-claw {
    position: absolute;
    top: 60px;
}

.lobster-claw.left {
    left: -30px;
}

.lobster-claw.right {
    right: -30px;
}

.claw-arm {
    width: 50px;
    height: 8px;
    background: #e74c3c;
    border-radius: 4px;
}

.claw-pincer {
    width: 30px;
    height: 30px;
    border: 6px solid #e74c3c;
    border-radius: 50%;
    position: relative;
    margin-top: -4px;
    margin-left: 20px;
    clip-path: polygon(0 0, 60% 0, 100% 80%, 100% 100%, 0 100%);
}

.lobster-claw.right .claw-pincer {
    margin-left: 0;
    margin-right: 20px;
    clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%, 0 80%);
}

.lobster-legs {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
}

.leg {
    width: 6px;
    height: 40px;
    background: linear-gradient(180deg, #e74c3c, #c0392b);
    border-radius: 3px;
    animation: leg-wave 2s infinite;
}

.leg:nth-child(2) { animation-delay: -0.5s; }
.leg:nth-child(3) { animation-delay: -1s; }
.leg:nth-child(4) { animation-delay: -1.5s; }

@keyframes leg-wave {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-3px) rotate(5deg); }
}

.speech-bubble {
    position: absolute;
    top: -20px;
    right: -100px;
    background: white;
    color: var(--text-primary);
    padding: 10px 18px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow);
    white-space: nowrap;
}

.speech-bubble::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 20px;
    border-width: 10px 8px 0;
    border-style: solid;
    border-color: white transparent transparent;
}

.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    line-height: 0;
}

.hero-wave svg {
    width: 100%;
    height: 60px;
}

@media (max-width: 900px) {
    .hero-container { flex-direction: column; text-align: center; }
    .hero-content { max-width: 100%; }
    .hero-title { font-size: 32px; }
    .hero-stats { justify-content: center; }
    .hero-actions { justify-content: center; }
    .hero-visual { display: none; }
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.section-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* ===== 痛点区 ===== */
.pain-points {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.pain-card {
    background: var(--bg-primary);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.pain-emoji { font-size: 48px; margin-bottom: 16px; }

.pain-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.pain-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

.arrow-down {
    font-size: 32px;
    display: block;
    margin-bottom: 8px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

.pain-arrow p {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
}

/* ===== 功能特性 ===== */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon {
    position: relative;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 16px;
    background: var(--primary-light);
    border-radius: 16px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.feature-card > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.feature-details {
    list-style: none;
    font-size: 13px;
    color: var(--text-secondary);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.feature-details li {
    white-space: nowrap;
}

/* ===== 架构图 ===== */
.architecture {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.arch-diagram {
    max-width: 800px;
    margin: 0 auto;
}

.arch-row {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.arch-box {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    min-width: 200px;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.arch-icon { font-size: 32px; margin-bottom: 8px; }

.arch-box h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.arch-box > span {
    display: block;
    color: var(--text-secondary);
    font-size: 13px;
}

.arch-port {
    color: var(--primary) !important;
    font-weight: 600;
    font-size: 12px !important;
}

.arch-desc {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: left;
    line-height: 1.8;
}

.arch-arrows {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.arch-arrow-left, .arch-arrow-right {
    font-size: 14px;
    color: var(--accent);
    font-weight: 600;
}

.arch-row-dual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.arch-row-single {
    display: flex;
    justify-content: center;
}

.user-box { border-color: #3498db; background: #ebf5fb; }
.local-box { border-color: #27ae60; background: #eafaf1; }
.cloud-box { border-color: #e74c3c; background: var(--primary-light); }
.storage-box { border-color: #f39c12; background: var(--accent-light); }

@media (max-width: 600px) {
    .arch-row-dual { grid-template-columns: 1fr; }
}

/* ===== 模型提供商 ===== */
.providers {
    padding: 80px 0;
}

.providers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}

.provider-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

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

.provider-card.configured {
    border-color: #27ae60;
    background: #eafaf1;
}

.provider-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 10px;
    color: #27ae60;
    background: rgba(39,174,96,0.15);
    padding: 2px 8px;
    border-radius: 10px;
}

.provider-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: white;
    margin: 0 auto 12px;
}

.provider-logo.deepseek { background: #4f46e5; }
.provider-logo.xiaomi { background: #ff6900; }
.provider-logo.openai { background: #10a37f; }
.provider-logo.anthropic { background: #d4a373; }
.provider-logo.google { background: #4285f4; }
.provider-logo.zhipu { background: #6366f1; }
.provider-logo.moonshot { background: #8b5cf6; }
.provider-logo.baidu { background: #2932e1; }
.provider-logo.tencent { background: #00a4ff; }
.provider-logo.bytedance { background: #325195; }
.provider-logo.alibaba { background: #ff6a00; }
.provider-logo.xunfei { background: #1890ff; }
.provider-logo.groq { background: #f97316; }
.provider-logo.together { background: #6366f1; }
.provider-logo.mistral { background: #f97316; }
.provider-logo.openrouter { background: #8b5cf6; }
.provider-logo.minimax { background: #ef4444; }
.provider-logo.lingyi { background: #06b6d4; }

.provider-card h4 { font-size: 14px; margin-bottom: 4px; }

.provider-models {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== 安装步骤 ===== */
.install {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.install-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.step-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    min-width: 220px;
    flex: 1;
    max-width: 280px;
    transition: transform 0.2s;
}

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

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin: 0 auto 12px;
}

.step-lobster { font-size: 28px; margin-bottom: 8px; }

.step-card h3 { font-size: 18px; margin-bottom: 8px; }

.step-card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

.step-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.step-connector {
    font-size: 24px;
    color: var(--primary);
    font-weight: 700;
}

/* ===== 下载区 ===== */
.download {
    padding: 80px 0;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.download-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.download-card.featured {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(231,76,60,0.15);
}

.download-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 6px 20px;
    border-radius: 14px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.download-os-icon { font-size: 48px; margin-bottom: 12px; }

.download-card h3 { font-size: 20px; margin-bottom: 4px; }

.download-card > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.download-features {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.download-features span {
    background: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-download {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 16px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(231,76,60,0.4);
}

.btn-download small {
    font-weight: 400;
    font-size: 11px;
    opacity: 0.8;
    margin-top: 4px;
}

.download-icon { font-size: 20px; }

.download-hash {
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-secondary);
}

.download-note {
    margin-top: 32px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.download-note p { margin-bottom: 8px; }

.download-note code {
    background: var(--primary-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
}

/* ===== 小龙虾宣言 ===== */
.motto {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
}

.motto-content {
    display: flex;
    align-items: center;
    gap: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.motto-lobster {
    flex-shrink: 0;
}

.lobster-mascot-small {
    width: 120px;
    height: 140px;
    position: relative;
}

.lobster-body-small { position: relative; width: 100%; height: 100%; }

.lobster-head-small {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 40px;
    background: var(--primary);
    border-radius: 50% 50% 40% 40%;
}

.lobster-eye-small {
    position: absolute;
    width: 10px;
    height: 10px;
    background: white;
    border-radius: 50%;
    top: 12px;
}

.lobster-eye-small::after {
    content: '';
    position: absolute;
    width: 5px;
    height: 5px;
    background: #1a1a2e;
    border-radius: 50%;
    top: 1px;
    left: 1px;
}

.lobster-eye-small.left { left: 10px; }
.lobster-eye-small.right { right: 10px; }

.lobster-claw-small {
    position: absolute;
    top: 40px;
    width: 30px;
    height: 20px;
    border: 4px solid var(--primary);
    border-radius: 50%;
}

.lobster-claw-small.left { left: -20px; clip-path: polygon(0 0, 60% 0, 100% 80%, 100% 100%, 0 100%); }
.lobster-claw-small.right { right: -20px; clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%, 0 80%); }

.lobster-tail-small {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 30px;
    background: var(--primary);
    border-radius: 0 0 50% 50%;
}

.motto-text { flex: 1; }

.motto-text h2 {
    font-size: 24px;
    margin-bottom: 16px;
}

.motto-text blockquote {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-primary);
    border-left: 4px solid var(--primary);
    padding-left: 20px;
    font-style: italic;
}

.motto-author {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    text-align: right;
}

@media (max-width: 600px) {
    .motto-content { flex-direction: column; text-align: center; }
    .motto-text blockquote { border-left: none; padding-left: 0; }
    .motto-author { text-align: center; }
}

/* ===== FAQ ===== */
.faq {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    background: var(--bg-primary);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 18px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: background 0.2s;
}

.faq-question:hover {
    background: rgba(0,0,0,0.02);
}

.faq-arrow {
    margin-left: auto;
    font-size: 12px;
    transition: transform 0.3s;
    color: var(--text-secondary);
}

.faq-item.open .faq-arrow {
    transform: rotate(180deg);
}

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

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 18px;
    font-weight: 700;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 15px;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.9);
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 8px;
    transition: color 0.2s;
}

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

.footer-contact p {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
    margin-bottom: 6px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.3);
    font-size: 13px;
}

.footer-made { margin-top: 4px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .section-header h2 { font-size: 24px; }
    .features-grid { grid-template-columns: 1fr; }
    .providers-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
    .install-steps { flex-direction: column; }
    .step-connector { transform: rotate(90deg); }
    .download-cards { grid-template-columns: 1fr; }
}