/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s; }
button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
ul { list-style: none; }

/* ===== 设计变量（浅灰色主题） ===== */
:root {
    --color-bg: #F4F5F8;
    --color-bg-2: #EAECEF;
    --color-bg-3: #DEE1E6;
    --color-surface: #FFFFFF;
    --color-surface-2: #F9FAFB;
    --color-border: #E2E8F0;
    --color-border-strong: rgba(91, 108, 255, 0.35);

    --color-text: #1E293B;
    --color-text-mute: #64748B;
    --color-text-dim: #94A3B8;
    --color-heading: #0F172A;

    --color-primary: #5B6CFF;
    --color-primary-2: #7C3AED;
    --color-primary-grad: linear-gradient(135deg, #5B6CFF 0%, #7C3AED 100%);
    --color-accent: #F59E0B;
    --color-accent-2: #EF4444;
    --color-success: #10B981;

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

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(91, 108, 255, 0.15);
    --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-card-hover: 0 16px 40px rgba(91, 108, 255, 0.18);

    --container: 1200px;
    --nav-h: 64px;
}

/* ===== 通用 ===== */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    text-align: center;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--color-primary-grad);
    color: #fff;
    box-shadow: 0 4px 14px rgba(91, 108, 255, 0.35);
}
.btn-primary:hover {
    box-shadow: 0 8px 24px rgba(91, 108, 255, 0.5);
    color: #fff;
}

.btn-secondary {
    background: #FFFFFF;
    color: var(--color-heading);
    border-color: var(--color-border);
}
.btn-secondary:hover {
    background: var(--color-bg-2);
    color: var(--color-heading);
    border-color: var(--color-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
}
.btn-ghost:hover {
    color: var(--color-primary);
}

.btn-outline {
    background: #FFFFFF;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-vip {
    background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}
.btn-vip:hover {
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.6);
    color: #fff;
}

.btn-link {
    color: var(--color-primary);
    padding: 0;
    background: none;
    box-shadow: none;
}
.btn-link:hover {
    color: #7C3AED;
    transform: translateX(4px);
}

.btn-block { display: flex; width: 100%; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-xl { padding: 18px 48px; font-size: 18px; border-radius: 14px; }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    height: var(--nav-h);
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-icon { width: 36px; height: 36px; flex-shrink: 0; }
.logo-icon svg { width: 100%; height: 100%; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-cn { font-size: 16px; font-weight: 700; color: var(--color-heading); }
.logo-en { font-size: 11px; font-weight: 500; color: var(--color-text-mute); margin-top: 2px; letter-spacing: 0.5px; }

.nav-links {
    display: flex;
    gap: 32px;
}
.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-mute);
    position: relative;
    padding: 4px 0;
}
.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary-grad);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--color-heading);
    border-radius: 2px;
    transition: 0.3s;
}

/* ===== 公告条 ===== */
.announcement-bar {
    background: linear-gradient(90deg, rgba(91, 108, 255, 0.06) 0%, rgba(124, 58, 237, 0.06) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 0;
    overflow: hidden;
    position: relative;
}
.announcement-track {
    display: flex;
    gap: 60px;
    white-space: nowrap;
    animation: marquee 40s linear infinite;
    will-change: transform;
}
.announcement-item {
    font-size: 13px;
    color: var(--color-text);
    flex-shrink: 0;
}
.announcement-item strong { color: var(--color-primary); margin-right: 4px; }
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ===== 英雄区（压缩版） ===== */
.hero {
    position: relative;
    padding: 56px 0 32px;
    overflow: hidden;
    isolation: isolate;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(91, 108, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91, 108, 255, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
}
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    animation: float 12s ease-in-out infinite;
}
.hero-glow-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #5B6CFF 0%, transparent 70%);
    top: -100px;
    left: -80px;
}
.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #7C3AED 0%, transparent 70%);
    bottom: -150px;
    right: -120px;
    animation-delay: -6s;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -20px) scale(1.1); }
}
.hero-particles { display: none; }

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(91, 108, 255, 0.1);
    border: 1px solid rgba(91, 108, 255, 0.25);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 16px;
    animation: fadeInUp 0.6s ease;
}
.hero-title {
    font-size: clamp(34px, 5vw, 56px);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 12px;
    color: var(--color-heading);
}
.hero-title-line { display: inline-block; }
.hero-title-highlight {
    background: linear-gradient(135deg, #5B6CFF 0%, #A855F7 50%, #F59E0B 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% auto;
    animation: shimmer 5s ease-in-out infinite;
    margin-left: 16px;
}
@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}
.hero-divider {
    width: 60px;
    height: 3px;
    background: var(--color-primary-grad);
    border-radius: 3px;
    margin: 16px auto;
}
.hero-subtitle {
    font-size: clamp(14px, 1.5vw, 16px);
    color: var(--color-text-mute);
    max-width: 560px;
    margin: 0 auto 24px;
    line-height: 1.6;
}
.hero-cta {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.hero-trust {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 12px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}
.trust-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.trust-num {
    font-size: 16px;
    font-weight: 800;
    color: var(--color-primary);
}
.trust-label {
    font-size: 11px;
    color: var(--color-text-mute);
}
.trust-divider {
    width: 1px;
    height: 20px;
    background: var(--color-border);
}

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

/* ===== 区块标题 ===== */
.section-head {
    text-align: center;
    margin-bottom: 40px;
}
.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(91, 108, 255, 0.08);
    border: 1px solid rgba(91, 108, 255, 0.2);
    border-radius: 100px;
    font-size: 12px;
    color: var(--color-primary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    font-weight: 500;
}
.section-title {
    font-size: clamp(26px, 3.5vw, 36px);
    font-weight: 800;
    color: var(--color-heading);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}
.section-subtitle {
    font-size: 15px;
    color: var(--color-text-mute);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 产品套餐（核心展示区） ===== */
.pricing {
    padding: 56px 0 80px;
    position: relative;
}
.pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}
.pricing .section-head { margin-bottom: 36px; }
.pricing .section-title {
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 900;
}
.pricing .section-tag {
    background: linear-gradient(135deg, rgba(91, 108, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-color: rgba(91, 108, 255, 0.3);
    color: var(--color-primary);
    font-weight: 600;
    padding: 6px 16px;
    font-size: 13px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 36px;
}

.pricing-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-card);
}
.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card-hover);
}

.pricing-card-featured {
    background: linear-gradient(180deg, rgba(91, 108, 255, 0.06) 0%, #FFFFFF 100%);
    border-color: rgba(91, 108, 255, 0.5);
    transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(91, 108, 255, 0.18);
    z-index: 1;
}
.pricing-card-featured:hover {
    transform: translateY(-8px) scale(1.05);
    border-color: var(--color-primary);
    box-shadow: 0 20px 60px rgba(91, 108, 255, 0.3);
}

.pricing-card-premium {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.06) 0%, #FFFFFF 100%);
    border-color: rgba(245, 158, 11, 0.4);
}
.pricing-card-premium:hover {
    border-color: var(--color-accent);
    box-shadow: 0 16px 40px rgba(245, 158, 11, 0.2);
}

.card-tag {
    position: absolute;
    top: -10px;
    left: 24px;
    padding: 4px 12px;
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-mute);
}
.card-tag-hot {
    background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    color: #fff;
    border: none;
}
.card-tag-vip {
    background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    color: #fff;
    border: none;
}

.card-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 12px;
    margin-top: 4px;
}
.card-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px dashed var(--color-border);
}
.price-symbol {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-mute);
}
.price-num {
    font-size: 42px;
    font-weight: 900;
    background: var(--color-primary-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}
.pricing-card-premium .price-num {
    background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    -webkit-background-clip: text;
    background-clip: text;
}
.price-unit {
    font-size: 13px;
    color: var(--color-text-mute);
}

.card-specs {
    flex: 1;
    margin-bottom: 20px;
}
.card-specs li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 0;
    font-size: 13px;
    color: var(--color-text);
}
.spec-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(91, 108, 255, 0.08);
    border-radius: 6px;
    font-size: 12px;
    flex-shrink: 0;
}

.pricing-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.pricing-bottom p {
    color: var(--color-text-mute);
    font-size: 13px;
    margin-bottom: 12px;
}

/* ===== 企业愿景 ===== */
.vision {
    padding: 80px 0;
    position: relative;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.vision-inner {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}
.vision-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 1px;
    margin-bottom: 20px;
}
.vision-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-mute);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.vision-quote {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    color: var(--color-heading);
    line-height: 1.3;
    margin-bottom: 24px;
    letter-spacing: -1px;
    position: relative;
}
.quote-mark {
    color: var(--color-primary);
    font-size: 1.2em;
    margin: 0 8px;
    opacity: 0.5;
}
.highlight {
    background: var(--color-primary-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.vision-desc {
    font-size: 15px;
    color: var(--color-text-mute);
    margin-bottom: 48px;
    line-height: 1.8;
}

.vision-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.stat-item {
    padding: 24px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s;
}
.stat-item:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}
.stat-num {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 900;
    background: var(--color-primary-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: 8px;
}
.stat-label {
    font-size: 12px;
    color: var(--color-text-mute);
}

/* ===== 服务承诺 ===== */
.features {
    padding: 80px 0;
    position: relative;
}
.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.feature-card {
    padding: 28px 22px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}
.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-primary-grad);
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 0;
}
.feature-card > * { position: relative; z-index: 1; }
.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card-hover);
}
.feature-icon {
    width: 44px;
    height: 44px;
    color: var(--color-primary);
    margin-bottom: 16px;
}
.feature-icon svg { width: 100%; height: 100%; }
.feature-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 10px;
}
.feature-desc {
    font-size: 13px;
    color: var(--color-text-mute);
    line-height: 1.7;
}

/* ===== 产品系列矩阵 ===== */
.series-matrix {
    padding: 80px 0;
    background: var(--color-bg-2);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.matrix-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.matrix-card {
    padding: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s;
    display: block;
    box-shadow: var(--shadow-card);
}
.matrix-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: var(--shadow-card-hover);
}
.matrix-flag {
    font-size: 32px;
    margin-bottom: 10px;
}
.matrix-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 14px;
}
.matrix-card ul {
    margin-bottom: 16px;
}
.matrix-card li {
    padding: 5px 0;
    font-size: 13px;
    color: var(--color-text-mute);
    position: relative;
    padding-left: 14px;
}
.matrix-card li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 8px;
    top: 10px;
}
.matrix-link {
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 600;
    transition: all 0.3s;
}
.matrix-card:hover .matrix-link {
    color: #7C3AED;
    transform: translateX(4px);
    display: inline-block;
}

/* ===== 适用场景 ===== */
.scenarios {
    padding: 80px 0;
    position: relative;
}
.scenarios::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.scenario-card {
    padding: 32px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s;
    text-align: center;
    box-shadow: var(--shadow-card);
}
.scenario-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: var(--shadow-card-hover);
}
.scenario-emoji {
    font-size: 40px;
    margin-bottom: 14px;
}
.scenario-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 10px;
}
.scenario-card p {
    font-size: 13px;
    color: var(--color-text-mute);
    line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 80px 0;
    background: var(--color-bg-2);
    border-top: 1px solid var(--color-border);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto 32px;
}
.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 10px;
    overflow: hidden;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-shadow: var(--shadow-card);
}
.faq-item.active {
    border-color: var(--color-primary);
    box-shadow: 0 6px 20px rgba(91, 108, 255, 0.12);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-heading);
    text-align: left;
    transition: background 0.2s;
}
.faq-question:hover {
    background: var(--color-bg-2);
}
.faq-arrow {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(91, 108, 255, 0.1);
    border-radius: 50%;
    color: var(--color-primary);
    font-size: 16px;
    font-weight: 700;
    transition: transform 0.3s, background 0.3s;
    flex-shrink: 0;
    margin-left: 12px;
}
.faq-item.active .faq-arrow {
    transform: rotate(45deg);
    background: var(--color-primary-grad);
    color: #fff;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.active .faq-answer {
    max-height: 400px;
    padding: 0 22px 20px;
}
.faq-answer p {
    color: var(--color-text-mute);
    line-height: 1.8;
    font-size: 14px;
}
.faq-more {
    text-align: center;
}

/* ===== 最终CTA ===== */
.final-cta {
    padding: 80px 0;
    position: relative;
    background: var(--color-bg);
}
.final-cta-inner {
    text-align: center;
    padding: 56px 40px;
    background:
        linear-gradient(135deg, rgba(91, 108, 255, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%),
        #FFFFFF;
    border: 1px solid rgba(91, 108, 255, 0.25);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.final-cta-inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(91, 108, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    opacity: 0.6;
    z-index: 0;
}
.final-cta-inner > * { position: relative; z-index: 1; }
.final-cta-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--color-primary);
    margin-bottom: 14px;
    text-transform: uppercase;
}
.final-cta-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    color: var(--color-heading);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.final-cta-desc {
    font-size: 15px;
    color: var(--color-text-mute);
    margin-bottom: 28px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-surface);
    padding: 56px 0 24px;
    border-top: 1px solid var(--color-border);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1.2fr;
    gap: 36px;
    margin-bottom: 32px;
}
.footer-brand .logo-icon { width: 36px; margin-bottom: 14px; }
.footer-tagline {
    font-size: 14px;
    color: var(--color-text-mute);
    margin-bottom: 8px;
}
.footer-since {
    font-size: 12px;
    color: var(--color-text-dim);
}
.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 14px;
}
.footer-col li {
    margin-bottom: 8px;
}
.footer-col a {
    font-size: 13px;
    color: var(--color-text-mute);
}
.footer-col a:hover { color: var(--color-primary); }
.footer-newsletter-desc {
    font-size: 12px;
    color: var(--color-text-mute);
    margin-bottom: 12px;
    line-height: 1.6;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}
.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-dim);
    margin-bottom: 4px;
}
.footer-disclaimer {
    color: var(--color-text-dim);
    font-size: 11px;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-card-featured { transform: scale(1); }
    .pricing-card-featured:hover { transform: translateY(-8px) scale(1); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .vision-stats { grid-template-columns: repeat(2, 1fr); }
    .matrix-grid { grid-template-columns: repeat(2, 1fr); }
    .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
    :root { --nav-h: 60px; }
    .nav-links { display: none; }
    .mobile-menu-btn { display: flex; }
    .nav-actions .btn-ghost { display: none; }

    .hero { padding: 40px 0 24px; }
    .hero-title-highlight { margin-left: 8px; }
    .hero-trust { flex-wrap: wrap; gap: 10px; padding: 12px 16px; }
    .trust-divider { display: none; }
    .trust-item { flex: 0 0 calc(50% - 5px); }

    .pricing { padding: 40px 0 60px; }
    .pricing-grid { grid-template-columns: 1fr; gap: 14px; }
    .features-grid { grid-template-columns: 1fr; }
    .vision-stats { grid-template-columns: 1fr 1fr; }
    .matrix-grid { grid-template-columns: 1fr; }
    .scenarios-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }

    .section-head { margin-bottom: 32px; }
    .vision, .features, .series-matrix, .scenarios, .faq-section, .final-cta { padding: 56px 0; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-cta { flex-direction: column; align-items: stretch; }
    .hero-cta .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; }
    .vision-stats { grid-template-columns: 1fr; }
    .pricing-card { padding: 22px 18px; }
    .price-num { font-size: 32px; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg-2); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #5B6CFF 0%, #7C3AED 100%);
    border-radius: 10px;
    border: 2px solid var(--color-bg-2);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* ===== 选择文本 ===== */
::selection {
    background: var(--color-primary);
    color: #fff;
}