/* 大象网络 - 套餐评测与选购指南 专属样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --text-main: #0f172a;
    --text-dim: #64748b;
    --border: #e2e8f0;
    --brand-green: #10b981;
    --brand-green-dark: #059669;
    --brand-green-light: #ecfdf5;
    --card-bg: #ffffff;
    --section-bg: #f8fafc;
    --badge-bg: #f1f5f9;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    background: #ffffff;
    color: var(--text-main);
    min-height: 100vh;
}

.landing-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 顶部导航栏 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 36px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand img {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: #475569;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--brand-green);
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-login {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid #cbd5e1;
    color: var(--text-main);
    background: transparent;
    transition: all 0.25s ease;
}

.btn-login:hover {
    border-color: var(--text-main);
    background: #f8fafc;
}

.btn-primary {
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid var(--text-main);
    background: var(--text-main);
    color: #ffffff;
    transition: all 0.25s ease;
}

.btn-primary:hover {
    background: var(--brand-green-dark);
    border-color: var(--brand-green-dark);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

/* ===== 鼠标跟随粒子画布 ===== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* ===== Hero 首屏区域 ===== */
.hero {
    position: relative;
    min-height: 94vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
    z-index: 10;
}

.bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(0, 0, 0, 0.035) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(0, 0, 0, 0.035) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    mask-image: radial-gradient(circle at center, black 0%, transparent 80%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--brand-green-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--brand-green-dark);
    margin-bottom: 24px;
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--brand-green);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero h1 {
    font-size: clamp(2.3rem, 4.2vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.18;
    margin-bottom: 18px;
    color: var(--text-main);
    max-width: 980px;
}

.hero h1 .gradient-word {
    background: radial-gradient(circle, #7182FF 0%, #3CFF52 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: textShine 3s ease-in-out infinite alternate;
}

@keyframes textShine {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

.hero .subtitle {
    font-size: clamp(1.2rem, 2.2vw, 1.7rem);
    font-weight: 700;
    color: #334155;
    margin-bottom: 16px;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.hero .subtitle.show {
    opacity: 1;
    transform: translateY(0);
}

.hero .description {
    font-size: 1.05rem;
    color: var(--text-dim);
    max-width: 720px;
    line-height: 1.7;
    margin-bottom: 32px;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.6s ease 0.15s, transform 0.6s ease 0.15s;
}

.hero .description.show {
    opacity: 1;
    transform: translateY(0);
}

/* 实测硬指标统计条 */
.metrics-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 900px;
    width: 100%;
    margin: 0 auto 36px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.6s ease 0.25s, transform 0.6s ease 0.25s;
}

.metrics-bar.show {
    opacity: 1;
    transform: translateY(0);
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    border-right: 1px solid #f1f5f9;
}

.metric-item:last-child {
    border-right: none;
}

.metric-val {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--brand-green-dark);
    letter-spacing: -0.02em;
}

.metric-label {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease 0.35s, transform 0.6s ease 0.35s;
}

.cta-group.show {
    opacity: 1;
    transform: translateY(0);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 34px;
    background: var(--text-main);
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    border-radius: 999px;
    transition: all 0.25s ease;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.2);
    border: none;
    cursor: pointer;
}

.cta-btn:hover {
    background: var(--brand-green-dark);
    box-shadow: 0 6px 25px rgba(16, 185, 129, 0.35);
    transform: translateY(-2px);
}

.cta-btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    background: transparent;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid #cbd5e1;
    transition: all 0.25s ease;
}

.cta-btn-outline:hover {
    border-color: var(--text-main);
    background: #f8fafc;
    transform: translateY(-1px);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.scroll-indicator .mouse {
    width: 22px;
    height: 36px;
    border: 2px solid #94a3b8;
    border-radius: 12px;
    position: relative;
}

.scroll-indicator .mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 6px;
    background: #64748b;
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% { transform: translate(-50%, 0); opacity: 1; }
    50% { transform: translate(-50%, 10px); opacity: 0.2; }
    100% { transform: translate(-50%, 0); opacity: 1; }
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: #94a3b8;
    letter-spacing: 0.05em;
}

/* ===== 通用板块头部 ===== */
.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--brand-green-dark);
    background: var(--brand-green-light);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 5px 16px;
    border-radius: 999px;
    margin-bottom: 18px;
}

.section-title {
    font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.section-title span {
    color: var(--brand-green-dark);
}

.section-subtitle {
    margin-top: 12px;
    font-size: 1rem;
    color: var(--text-dim);
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ===== 套餐评测区块 (Pricing Section) ===== */
.pricing-section {
    background: var(--section-bg);
    padding: 110px 40px;
    position: relative;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 28px;
    max-width: 1240px;
    margin: 0 auto;
    align-items: stretch;
}

.pricing-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    padding: 40px 28px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: #cbd5e1;
}

.pricing-card.recommended {
    border: 2px solid var(--brand-green);
    box-shadow: 0 12px 36px rgba(16, 185, 129, 0.15);
}

.pricing-card.recommended::before {
    content: "HOT · 爆款首选";
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--brand-green);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: 20px;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.pricing-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    background: #f1f5f9;
    font-size: 0.75rem;
    font-weight: 700;
    color: #475569;
    margin-bottom: 14px;
    width: fit-content;
}

.plan-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 12px;
}

.plan-price {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 6px;
    display: flex;
    align-items: baseline;
    letter-spacing: -0.03em;
}

.plan-price span {
    font-size: 0.95rem;
    color: var(--text-dim);
    font-weight: 500;
    margin-left: 6px;
    letter-spacing: normal;
}

.plan-cycle-note {
    font-size: 0.8rem;
    color: var(--brand-green-dark);
    font-weight: 600;
    margin-bottom: 24px;
}

.plan-features {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-features li {
    font-size: 0.9rem;
    color: #334155;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.plan-features li::before {
    content: "✓";
    color: var(--brand-green);
    font-weight: 800;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.pricing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 13px 20px;
    background: #0f172a;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
}

.pricing-btn:hover {
    background: var(--brand-green-dark);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.pricing-card.recommended .pricing-btn {
    background: var(--brand-green);
}

.pricing-card.recommended .pricing-btn:hover {
    background: #059669;
}

/* ===== 晚高峰实测跑分对比表 ===== */
.benchmark-section {
    padding: 110px 40px;
    background: #ffffff;
}

.benchmark-wrap {
    max-width: 1120px;
    margin: 0 auto;
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.03);
    background: #ffffff;
}

.benchmark-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}

.benchmark-table th {
    background: #f8fafc;
    color: var(--text-main);
    font-weight: 700;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.benchmark-table td {
    padding: 18px 24px;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
    vertical-align: middle;
}

.benchmark-table tr:last-child td {
    border-bottom: none;
}

.benchmark-table tr:hover td {
    background: #f8fafc;
}

.node-cell {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    color: var(--text-main);
}

.node-cell img {
    width: 24px;
    height: 16px;
    object-fit: cover;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.latency-pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    background: #dcfce7;
    color: #166534;
}

.speed-tag {
    font-weight: 700;
    color: var(--text-main);
}

.tag-stream {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.78rem;
    padding: 3px 8px;
    border-radius: 4px;
    background: #f1f5f9;
    color: #475569;
}

/* ===== 六大不跑路架构硬实力 ===== */
.features-section {
    padding: 110px 40px;
    background: var(--section-bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 1180px;
    margin: 0 auto;
}

.feature-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 32px 26px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
}

.feature-num {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--brand-green);
    margin-bottom: 14px;
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-main);
}

.feature-card p {
    font-size: 0.92rem;
    color: #64748b;
    line-height: 1.65;
}

/* ===== 业务场景智能选购决策指南 ===== */
.decision-section {
    padding: 110px 40px;
    background: #ffffff;
}

.decision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1180px;
    margin: 0 auto;
}

.decision-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
}

.decision-badge {
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--brand-green-light);
    color: var(--brand-green-dark);
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.decision-card h4 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-main);
}

.decision-card p {
    font-size: 0.9rem;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.decision-pick {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
    padding-top: 14px;
    border-top: 1px dashed #cbd5e1;
}

/* ===== 行业客户评价 ===== */
.reviews-section {
    padding: 110px 40px;
    background: var(--section-bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1180px;
    margin: 0 auto;
}

.review-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 18px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
}

.review-stars {
    color: #f59e0b;
    font-size: 1.1rem;
    letter-spacing: 2px;
}

.review-quote {
    font-size: 0.93rem;
    color: #334155;
    line-height: 1.7;
    flex-grow: 1;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.review-user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e2e8f0;
}

.review-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
}

.review-meta {
    font-size: 0.8rem;
    color: #64748b;
}

/* ===== 账务与选购常见问题 (FAQ) ===== */
.faq-section {
    padding: 110px 40px;
    background: #ffffff;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
    gap: 24px;
    max-width: 1120px;
    margin: 0 auto;
}

.faq-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 28px 24px;
}

.faq-q {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.faq-q::before {
    content: "Q";
    font-size: 0.85rem;
    font-weight: 800;
    background: var(--brand-green-light);
    color: var(--brand-green-dark);
    padding: 2px 7px;
    border-radius: 4px;
    display: inline-block;
}

.faq-a {
    font-size: 0.92rem;
    color: #64748b;
    line-height: 1.7;
    padding-left: 28px;
}

/* ===== 底部行动号召 (CTA Banner) ===== */
.cta-section {
    padding: 100px 40px;
    background: #ffffff;
    text-align: center;
}

.cta-box {
    max-width: 900px;
    margin: 0 auto;
    background: #0f172a;
    color: #ffffff;
    border-radius: 24px;
    padding: 60px 40px;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.15);
    position: relative;
    overflow: hidden;
}

.cta-box .bg-grid {
    background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
}

.cta-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-desc {
    font-size: 1.05rem;
    color: #94a3b8;
    max-width: 620px;
    margin: 0 auto 36px;
    line-height: 1.6;
}

.cta-box .cta-btn {
    background: var(--brand-green);
    color: #ffffff;
}

.cta-box .cta-btn:hover {
    background: #34d399;
}

/* ===== 页脚 (Footer) ===== */
footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-dim);
    font-size: 0.85rem;
    background: #ffffff;
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 10;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-bottom: 16px;
}

.footer-links a {
    color: #475569;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.footer-copy {
    color: #94a3b8;
}

/* ===== 侧边圆点导航 ===== */
.side-nav {
    position: fixed;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 14px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.side-nav.visible {
    opacity: 1;
}

.side-nav a {
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #cbd5e1;
    transition: all 0.3s ease;
    position: relative;
}

.side-nav a.active {
    background: var(--brand-green-dark);
    transform: scale(1.35);
}

.side-nav a:hover {
    background: var(--brand-green);
}

/* ===== 移动端响应式 ===== */
@media (max-width: 768px) {
    header {
        padding: 0 16px;
    }
    .nav-links {
        display: none;
    }
    .hero {
        padding: 100px 16px 60px;
    }
    .hero h1 {
        font-size: 1.85rem;
    }
    .hero .subtitle {
        font-size: 1.15rem;
    }
    .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
        padding: 16px;
    }
    .metric-item:nth-child(2) {
        border-right: none;
    }
    .cta-group {
        flex-direction: column;
        width: 100%;
    }
    .cta-btn, .cta-btn-outline {
        width: 100%;
    }
    .pricing-section, .benchmark-section, .features-section, .decision-section, .reviews-section, .faq-section, .cta-section {
        padding: 70px 18px;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .side-nav {
        display: none;
    }
    .scroll-indicator span {
        display: none;
    }
}