/* ============================================================
   AngerPacket 官网样式 — 深色科技风
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #161b25;
    --bg-card-hover: #1c2333;
    --border: #1e2a3a;
    --border-light: #2a3648;

    --text-primary: #e8edf4;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.25);

    --green: #22c55e;
    --green-glow: rgba(34, 197, 94, 0.2);
    --yellow: #f59e0b;
    --red: #ef4444;
    --purple: #a855f7;

    --gradient-1: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #22c55e, #3b82f6);
    --gradient-3: linear-gradient(135deg, #f59e0b, #ef4444);

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- 通用组件 ---------- */
.section {
    padding: 100px 20px;
    position: relative;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

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

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

/* ---------- 按钮 ---------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 0 24px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid var(--border-light);
    transition: var(--transition);
    cursor: pointer;
}
.btn-outline:hover {
    border-color: var(--accent);
    background: rgba(59,130,246,0.06);
}

.btn-lg { padding: 14px 32px; font-size: 1.05rem; border-radius: var(--radius-lg); }

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 20px;
    transition: var(--transition);
    backdrop-filter: blur(0px);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
}


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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after { width: 100%; }

.nav-cta { display: none; }

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---------- Hero 首屏 ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 70%);
}

.hero-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    max-width: 1200px;
    width: 100%;
    position: relative;
    z-index: 2;
}

.hero-container {
    flex: 1;
    max-width: 560px;
    text-align: left;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,130,246,0.1);
    border: 1px solid rgba(59,130,246,0.25);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-light);
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green-glow);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto 36px;
}

.hero-subtitle strong {
    color: var(--text-primary);
    font-weight: 700;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 终端模拟器 */
.hero-terminal {
    flex: 0 0 420px;
    max-width: 480px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #1a1f2e;
    border-bottom: 1px solid var(--border);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #22c55e; }

.terminal-title {
    margin-left: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.terminal-body,
.hero-terminal iframe {
    padding: 20px 24px;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    font-size: 0.85rem;
    line-height: 2;
}

.terminal-line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.t-prompt { color: var(--green); font-weight: 700; }
.t-info { color: var(--text-muted); }
.t-success { color: var(--green); }
.t-highlight { color: var(--accent-light); font-weight: 600; }

.cursor-blink::after {
    content: '▊';
    color: var(--accent);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ---------- 功能特性 ---------- */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover { border-color: var(--border-light); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-card:hover::before { opacity: 1; }
.card-charles::before { background: var(--gradient-3); }
.card-wpe::before { background: var(--gradient-1); }
.card-ccproxy::before { background: var(--gradient-2); }

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.card-charles .feature-icon { color: var(--yellow); background: rgba(245,158,11,0.1); }
.card-wpe .feature-icon { color: var(--purple); background: rgba(168,85,247,0.1); }
.card-ccproxy .feature-icon { color: var(--green); background: rgba(34,197,94,0.1); }

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card > p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 16px;
    line-height: 1.65;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
    font-size: 0.8rem;
}

/* 扩展功能 */
.features-extra {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.extra-item {
    display: flex;
    gap: 14px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.extra-item:hover { border-color: var(--border-light); background: var(--bg-card-hover); }

.extra-icon { flex-shrink: 0; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; color: var(--accent-light); }

.extra-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.extra-item p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ---------- 界面预览 ---------- */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.screenshot-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.screenshot-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.screenshot-card img {
    width: 100%;
    display: block;
    border-bottom: 1px solid var(--border);
}

.screenshot-card p {
    padding: 14px 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin: 0;
}

/* ---------- 工作流程 ---------- */
.workflow-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.wf-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    flex: 1;
    min-width: 200px;
    max-width: 260px;
    position: relative;
    transition: var(--transition);
}

.wf-step:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 8px 24px rgba(59,130,246,0.12); }

.wf-number {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(59,130,246,0.08);
    position: absolute;
    top: 8px;
    right: 16px;
    line-height: 1;
}

.wf-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    background: rgba(59,130,246,0.08);
    border-radius: 50%;
}

.wf-step h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.wf-step p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.wf-arrow {
    font-size: 1.8rem;
    color: var(--text-muted);
    align-self: center;
    font-weight: 300;
}

/* ---------- 技术架构 ---------- */
.architecture {
    background: var(--bg-secondary);
}

.arch-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.arch-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    text-align: center;
    min-width: 160px;
}

.arch-core {
    border-color: var(--accent);
    box-shadow: 0 0 32px var(--accent-glow);
    min-width: 240px;
}

.arch-box-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--accent-light);
}

.arch-box-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.arch-layers {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.arch-layer {
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.arch-arrow-h {
    font-size: 1.5rem;
    color: var(--text-muted);
    font-weight: 700;
}

.arch-ports {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.port-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
}

.port-card:hover { border-color: var(--accent); }

.port-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--accent-light);
    font-family: "SF Mono", "Fira Code", monospace;
}

.port-name {
    display: block;
    font-weight: 700;
    font-size: 0.9rem;
    margin: 6px 0;
}

.port-desc {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.tech-stack h3 {
    text-align: center;
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    font-weight: 500;
}

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

.tech-tag {
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.2);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.82rem;
    color: var(--accent-light);
    font-weight: 500;
    font-family: "SF Mono", "Fira Code", monospace;
}

/* ---------- API 文档 ---------- */
.api-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.api-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.api-card:hover { border-color: var(--border-light); }

.api-method {
    display: inline-block;
    padding: 3px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: "SF Mono", "Fira Code", monospace;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.api-method.post { background: rgba(34,197,94,0.12); color: var(--green); }

.api-path {
    display: inline-block;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-light);
    margin-left: 8px;
}

.api-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 12px 0 8px;
}

.api-card > p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.code-block {
    background: #0d1117;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: #161b25;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.copy-btn {
    background: none;
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
}

.copy-btn:hover { border-color: var(--accent); color: var(--accent-light); }

.code-block pre {
    padding: 16px;
    overflow-x: auto;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    font-size: 0.82rem;
    line-height: 1.8;
    color: #c9d1d9;
}

.code-comment { color: #6e7681; }
.code-keyword { color: #ff7b72; }
.code-string { color: #a5d6ff; }
.code-key { color: #79c0ff; }
.code-bool { color: #ff7b72; }
.code-number { color: #a5d6ff; }

.api-response {
    background: #0d1117;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.resp-label {
    display: block;
    padding: 8px 16px;
    font-size: 0.78rem;
    color: var(--text-muted);
    background: #161b25;
    border-bottom: 1px solid var(--border);
}

.api-response pre {
    padding: 16px;
    overflow-x: auto;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    font-size: 0.82rem;
    line-height: 1.8;
    color: #c9d1d9;
}

/* ---------- 安装部署 ---------- */
.install-tabs {
    max-width: 780px;
    margin: 0 auto 48px;
}

.tab-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.tab-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.tab-btn:hover { border-color: var(--border-light); color: var(--text-primary); }
.tab-btn.active {
    background: rgba(59,130,246,0.1);
    border-color: var(--accent);
    color: var(--accent-light);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.install-requirements {
    max-width: 780px;
    margin: 0 auto;
}

.install-requirements h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.req-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.req-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}

.req-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.req-value {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ---------- 适用场景 ---------- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.case-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(59,130,246,0.1);
}

.case-icon { margin-bottom: 16px; color: var(--accent-light); display: flex; align-items: center; justify-content: center; }

.case-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.case-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 20px 30px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand { max-width: 300px; }

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}


.footer-brand p {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    font-size: 0.88rem;
    padding: 4px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: 1fr 1fr; }
    .features-extra { grid-template-columns: 1fr 1fr; }
    .arch-ports { grid-template-columns: 1fr 1fr; }
    .api-cards { grid-template-columns: 1fr; }
    .req-grid { grid-template-columns: 1fr 1fr; }
    .cases-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .section { padding: 64px 16px; }
    .section-title { font-size: 1.8rem; }
    .hero { flex-direction: column; padding: 100px 16px 60px; }
    .hero-row { flex-direction: column; gap: 32px; }
    .hero-container { max-width: 100%; text-align: center; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-terminal { flex: none; width: 100%; max-width: 100%; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-stats { gap: 24px; }
    .stat-value { font-size: 1.5rem; }

    .nav-links, .nav-cta { display: none; }
    .mobile-toggle { display: flex; }
    .nav-container { height: 56px; }

    .navbar.mobile-open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: rgba(10,14,23,0.96);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px;
        gap: 12px;
    }
    .navbar.mobile-open .nav-cta { display: inline-flex; margin-top: 8px; }

    .features-grid { grid-template-columns: 1fr; }
    .features-extra { grid-template-columns: 1fr; }
    .screenshots-grid { grid-template-columns: 1fr; }
    .arch-diagram { flex-direction: column; }
    .arch-arrow-h { transform: rotate(90deg); }
    .arch-ports { grid-template-columns: 1fr 1fr; }
    .api-cards { grid-template-columns: 1fr; }
    .req-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .footer-container { flex-direction: column; }
    .footer-links { gap: 32px; flex-wrap: wrap; }

    .workflow-steps { flex-direction: column; align-items: center; }
    .wf-arrow { transform: rotate(90deg); }
    .wf-step { max-width: 100%; }
}

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

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