/* ==========================================================================
   台亮 AI 获客系统 · 官网样式表
   主题:渐变紫赛博科技风
   作者:甘肃虚拟现实网络科技有限公司
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
    /* 配色 - 渐变紫赛博 */
    --bg-base:        #0f0524;          /* 主背景 深紫黑 */
    --bg-elevated:    #1a0a2e;          /* 次背景 */
    --bg-card:        rgba(30, 14, 55, 0.75);  /* 卡片底 */
    --bg-card-hover:  rgba(45, 20, 75, 0.85);
    --primary:        #7c3aed;          /* 主紫 */
    --primary-light:  #a855f7;
    --accent:         #ec4899;          /* 粉色点缀 */
    --accent2:        #06b6d4;          /* 青色点缀 */
    --grad-primary:   linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
    --grad-cyber:     linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --grad-glow:      linear-gradient(135deg, #a855f7 0%, #ec4899 50%, #06b6d4 100%);
    --text-main:      #f3e8ff;          /* 主文字 浅紫白 */
    --text-muted:     #b8a8d4;          /* 次文字 */
    --text-dim:       #8b7aa8;          /* 弱文字 */
    --border:         rgba(168, 85, 247, 0.25);
    --border-hover:   rgba(236, 72, 153, 0.5);
    --shadow-glow:    0 0 40px rgba(124, 58, 237, 0.4);
    --shadow-card:    0 8px 32px rgba(0, 0, 0, 0.4);

    /* 尺寸 */
    --max-width:      1200px;
    --nav-height:     70px;
    --radius:         16px;
    --radius-sm:      10px;
    --radius-lg:      24px;
    --transition:     all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 20px);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg-base);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
    /* 背景氛围光晕 */
    background-image:
        radial-gradient(circle at 15% 20%, rgba(124, 58, 237, 0.18) 0%, transparent 45%),
        radial-gradient(circle at 85% 80%, rgba(236, 72, 153, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
    background-attachment: fixed;
}

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

/* 网格背景纹理 */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* ---------- 太空背景层(地球居中 + 两侧星空延伸) ---------- */
.earth-bg {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.55;
    overflow: hidden;
}
.earth-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    animation: spaceZoom 60s ease-in-out infinite alternate;
}
@keyframes spaceZoom {
    from { transform: scale(0.82); }
    to   { transform: scale(0.9); }
}

/* 两侧星空延伸层 - 纯CSS生成的星点 + 渐变 */
.starfield {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    /* 底色:深紫黑过渡,让两侧自然融入太空 */
    background:
        /* 左侧渐暗 */
        linear-gradient(90deg, rgba(15, 5, 36, 0.9) 0%, rgba(15, 5, 36, 0.5) 20%, transparent 38%, transparent 62%, rgba(15, 5, 36, 0.5) 80%, rgba(15, 5, 36, 0.9) 100%),
        /* 上下渐暗 */
        linear-gradient(180deg, rgba(15, 5, 36, 0.7) 0%, transparent 30%, transparent 70%, rgba(15, 5, 36, 0.8) 100%);
    /* 三层星点,不同大小不同位置,用径向渐变模拟 */
    background-blend-mode: screen;
}

/* 星点层1:细密小星 */
.starfield::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 5% 15%, #fff, transparent),
        radial-gradient(1px 1px at 12% 45%, #c4b5fd, transparent),
        radial-gradient(1px 1px at 3% 70%, #fff, transparent),
        radial-gradient(1px 1px at 8% 85%, #f9a8d4, transparent),
        radial-gradient(1px 1px at 15% 25%, #fff, transparent),
        radial-gradient(2px 2px at 2% 55%, #fff, transparent),
        radial-gradient(1px 1px at 18% 60%, #93c5fd, transparent),
        radial-gradient(1px 1px at 6% 35%, #fff, transparent),
        radial-gradient(1px 1px at 92% 20%, #fff, transparent),
        radial-gradient(1px 1px at 96% 50%, #c4b5fd, transparent),
        radial-gradient(1px 1px at 88% 75%, #fff, transparent),
        radial-gradient(1px 1px at 94% 90%, #f9a8d4, transparent),
        radial-gradient(1px 1px at 85% 35%, #fff, transparent),
        radial-gradient(2px 2px at 97% 65%, #fff, transparent),
        radial-gradient(1px 1px at 82% 55%, #93c5fd, transparent),
        radial-gradient(1px 1px at 90% 10%, #fff, transparent);
    animation: twinkle 4s ease-in-out infinite alternate;
}

/* 星点层2:中等到亮星 */
.starfield::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1.5px 1.5px at 10% 10%, #fff, transparent),
        radial-gradient(2px 2px at 4% 40%, #ddd6fe, transparent),
        radial-gradient(1px 1px at 14% 80%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 7% 65%, #fbcfe8, transparent),
        radial-gradient(1px 1px at 1% 25%, #fff, transparent),
        radial-gradient(2px 2px at 16% 50%, #bfdbfe, transparent),
        radial-gradient(1.5px 1.5px at 89% 15%, #fff, transparent),
        radial-gradient(2px 2px at 95% 45%, #ddd6fe, transparent),
        radial-gradient(1px 1px at 86% 80%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 93% 65%, #fbcfe8, transparent),
        radial-gradient(1px 1px at 99% 25%, #fff, transparent),
        radial-gradient(2px 2px at 84% 50%, #bfdbfe, transparent);
    animation: twinkle 3s ease-in-out infinite alternate-reverse;
}

@keyframes twinkle {
    from { opacity: 0.5; }
    to   { opacity: 1; }
}

/* 渐变遮罩:底部偏暗融入主色调 */
.earth-glow {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at center 60%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
}

/* 内容层提到 z-index:2,确保在背景和粒子之上 */
.navbar { z-index: 1000; }
.container { z-index: 2; }
.section { z-index: 2; }
.footer { z-index: 2; }
.page-hero { z-index: 2; }
.hero-inner { z-index: 2; }
.hero::before, .hero::after { z-index: 0; }
#particle-canvas { z-index: 1; }

@media (max-width: 768px) {
    .earth-bg { opacity: 0.4; }
    .starfield::before, .starfield::after { opacity: 0.6; }
}

/* ---------- 通用容器 ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(236, 72, 153, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1.5px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--primary-light);
    background: rgba(124, 58, 237, 0.1);
}

.btn-lg { padding: 18px 40px; font-size: 18px; }

/* ==========================================================================
   导航栏
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: rgba(15, 5, 36, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-inner {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 19px;
    font-weight: 800;
}
.logo-mark {
    width: 38px; height: 38px;
    border-radius: 10px;
    background: var(--grad-glow);
    background-size: 200% 200%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 900;
    color: #fff;
    box-shadow: 0 0 18px rgba(124, 58, 237, 0.6);
    animation: logoShift 5s ease infinite;
    letter-spacing: -1px;
}
@keyframes logoShift {
    0%,100% { background-position: 0% 50%; }
    50%     { background-position: 100% 50%; }
}
.logo-text { letter-spacing: 0.5px; }
.logo-text .dot {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-menu a {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-muted);
}
.nav-menu a:hover { color: var(--text-main); background: rgba(124, 58, 237, 0.15); }
.nav-menu a.active { color: #fff; background: rgba(124, 58, 237, 0.25); }

.nav-cta { margin-left: 10px; }
.nav-cta .btn { padding: 10px 22px; font-size: 14px; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================================================
   通用 Section 标题
   ========================================================================== */
.section { padding: 100px 0; position: relative; }

.section-head { text-align: center; margin-bottom: 64px; }
.section-head .eyebrow {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    background: rgba(124, 58, 237, 0.18);
    border: 1px solid var(--border);
    color: var(--primary-light);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 18px;
}
.section-head h2 {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 18px;
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-head p {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto;
}

/* ==========================================================================
   HERO 区
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-height) + 60px) 0 80px;
    position: relative;
    overflow: hidden;
}

/* 浮动光球装饰 */
.hero::before, .hero::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    z-index: 0;
}
.hero::before {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #7c3aed, transparent);
    top: -100px; left: -150px;
    animation: float 8s ease-in-out infinite;
}
.hero::after {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #ec4899, transparent);
    bottom: -100px; right: -100px;
    animation: float 10s ease-in-out infinite reverse;
}
@keyframes float {
    0%,100% { transform: translate(0, 0); }
    50%     { transform: translate(30px, -30px); }
}

.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 100px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid var(--border);
    font-size: 14px;
    color: var(--primary-light);
    margin-bottom: 28px;
}
.hero-badge .pulse {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 12px #22c55e;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%,100% { opacity: 1; }
    50%     { opacity: 0.4; }
}

.hero h1 {
    font-size: 64px;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 24px;
}
.hero h1 .grad {
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 20px;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

/* Hero 核心数据条 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 920px;
    margin: 0 auto;
}
.stat {
    text-align: center;
    padding: 28px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}
.stat:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}
.stat-num {
    font-size: 40px;
    font-weight: 800;
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.stat-unit { font-size: 18px; }
.stat-label { font-size: 14px; color: var(--text-muted); margin-top: 8px; }

/* ==========================================================================
   四大核心引擎(通用网格卡片)
   ========================================================================== */
.grid {
    display: grid;
    gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 30px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-primary);
    opacity: 0;
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow);
}
.card:hover::before { opacity: 1; }

.card-icon {
    width: 60px; height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(124,58,237,0.25), rgba(236,72,153,0.18));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 22px;
    border: 1px solid var(--border);
}
.card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}
.card p { color: var(--text-muted); font-size: 15px; }
.card .more {
    display: inline-block;
    margin-top: 18px;
    color: var(--primary-light);
    font-weight: 600;
    font-size: 14px;
}

/* ==========================================================================
   24h 工作流时间轴
   ========================================================================== */
.timeline {
    max-width: 880px;
    margin: 0 auto;
    position: relative;
}
.timeline::before {
    content: "";
    position: absolute;
    left: 30px; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #7c3aed, #ec4899, #06b6d4);
}
.tl-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 32px;
}
.tl-item:last-child { margin-bottom: 0; }
.tl-dot {
    position: absolute;
    left: 20px; top: 4px;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--grad-primary);
    border: 3px solid var(--bg-base);
    box-shadow: 0 0 18px rgba(124,58,237,0.6);
}
.tl-time {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(124,58,237,0.2);
    color: var(--primary-light);
    font-family: "Courier New", monospace;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 8px;
}
.tl-item h4 { font-size: 18px; margin-bottom: 6px; }
.tl-item p { color: var(--text-muted); font-size: 15px; }

/* ==========================================================================
   优势对比表
   ========================================================================== */
.compare {
    max-width: 960px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
}
.compare table { width: 100%; border-collapse: collapse; }
.compare th, .compare td {
    padding: 20px 28px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.compare thead th {
    background: rgba(124,58,237,0.15);
    font-size: 17px;
    font-weight: 700;
}
.compare thead th.us {
    background: var(--grad-primary);
    color: #fff;
}
.compare tbody tr:hover { background: rgba(124,58,237,0.08); }
.compare td:first-child { color: var(--text-muted); font-weight: 600; }
.compare .yes { color: #22c55e; font-weight: 700; }
.compare .no  { color: var(--text-dim); }
.compare .col-us { color: var(--text-main); }

/* ==========================================================================
   评价卡片
   ========================================================================== */
.quote-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}
.quote-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.quote-card .quote-mark {
    font-size: 48px;
    line-height: 1;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: Georgia, serif;
}
.quote-text { color: var(--text-main); font-size: 15px; margin: 10px 0 20px; }
.quote-meta { display: flex; align-items: center; gap: 14px; }
.quote-avatar {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--grad-primary);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 16px;
}
.quote-name { font-weight: 700; font-size: 15px; }
.quote-role { color: var(--text-dim); font-size: 13px; }

/* ==========================================================================
   功能列表页 - 模块分组
   ========================================================================== */
.feature-group { margin-bottom: 72px; }
.feature-group:last-child { margin-bottom: 0; }
.feature-group-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}
.feature-group-head .icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--grad-primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 26px;
    box-shadow: 0 0 24px rgba(124,58,237,0.4);
}
.feature-group-head h2 { font-size: 28px; font-weight: 800; }
.feature-group-head p { color: var(--text-muted); font-size: 15px; }

/* 功能生态芯片 */
.eco-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}
.eco-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 100px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}
.eco-chip:hover {
    border-color: var(--primary-light);
    background: rgba(124,58,237,0.15);
    transform: translateY(-2px);
}
.eco-chip .tag {
    font-size: 11px;
    color: var(--primary-light);
    background: rgba(124,58,237,0.2);
    padding: 2px 8px;
    border-radius: 6px;
}

/* ==========================================================================
   价格页
   ========================================================================== */
.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1080px;
    margin: 0 auto;
}
.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    position: relative;
    transition: var(--transition);
}
.price-card.featured {
    border-color: var(--primary-light);
    background: linear-gradient(180deg, rgba(124,58,237,0.18), var(--bg-card));
    box-shadow: var(--shadow-glow);
    transform: scale(1.03);
}
.price-card:hover { transform: translateY(-6px); }
.price-card.featured:hover { transform: scale(1.03) translateY(-6px); }
.price-badge {
    position: absolute;
    top: -14px; left: 50%;
    transform: translateX(-50%);
    padding: 6px 18px;
    border-radius: 100px;
    background: var(--grad-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
}
.price-card h3 { font-size: 24px; margin-bottom: 8px; }
.price-card .price-desc { color: var(--text-muted); font-size: 14px; margin-bottom: 20px; }
.price-num {
    font-size: 48px;
    font-weight: 800;
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.price-num small { font-size: 18px; -webkit-text-fill-color: var(--text-muted); }
.price-tag { color: var(--text-muted); font-size: 14px; margin-bottom: 28px; }
.price-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 15px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.price-features li::before {
    content: "✓";
    color: #22c55e;
    font-weight: 700;
    flex-shrink: 0;
}
.price-features li.off { color: var(--text-dim); }
.price-features li.off::before { content: "—"; color: var(--text-dim); }
.price-card .btn { width: 100%; justify-content: center; margin-top: 28px; }

/* ==========================================================================
   关于我们 - 时间轴 + 价值观
   ========================================================================== */
.history-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}
.history-timeline::before {
    content: "";
    position: absolute;
    left: 50%; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #7c3aed, #ec4899, #06b6d4);
    transform: translateX(-50%);
}
.ht-item {
    position: relative;
    width: 50%;
    padding: 0 40px 48px;
}
.ht-item:nth-child(odd) { left: 0; text-align: right; }
.ht-item:nth-child(even) { left: 50%; }
.ht-item .ht-dot {
    position: absolute;
    top: 4px;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--grad-primary);
    border: 3px solid var(--bg-base);
    box-shadow: 0 0 16px rgba(124,58,237,0.6);
}
.ht-item:nth-child(odd) .ht-dot { right: -9px; }
.ht-item:nth-child(even) .ht-dot { left: -9px; }
.ht-year {
    font-size: 22px;
    font-weight: 800;
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ht-item p { color: var(--text-muted); margin-top: 6px; font-size: 15px; }

.values-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.value-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.value-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}
.value-card .icon { font-size: 40px; margin-bottom: 16px; }
.value-card h3 { font-size: 20px; margin-bottom: 10px; }
.value-card p { color: var(--text-muted); font-size: 15px; }

/* 资质徽章 */
.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
.badge-pill {
    padding: 12px 24px;
    border-radius: 100px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
}
.badge-pill:hover {
    border-color: var(--primary-light);
    color: var(--text-main);
}

/* ==========================================================================
   常见问题 - 折叠
   ========================================================================== */
.faq-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.faq-tab {
    padding: 10px 22px;
    border-radius: 100px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.faq-tab:hover { color: var(--text-main); }
.faq-tab.active {
    background: var(--grad-primary);
    color: #fff;
    border-color: transparent;
}

.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item.open { border-color: var(--border-hover); }
.faq-q {
    padding: 22px 26px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.faq-q .arrow {
    flex-shrink: 0;
    width: 24px; height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.faq-item.open .faq-q .arrow { transform: rotate(180deg); color: var(--primary-light); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    color: var(--text-muted);
}
.faq-a-inner { padding: 0 26px 24px; line-height: 1.8; }

/* ==========================================================================
   系统演示 / 资料下载 卡片
   ========================================================================== */
.demo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}
.demo-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.demo-icon {
    width: 80px; height: 80px;
    margin: 0 auto 24px;
    border-radius: 20px;
    background: var(--grad-primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 36px;
    box-shadow: 0 0 32px rgba(124,58,237,0.5);
}
.demo-card h3 { font-size: 22px; margin-bottom: 10px; }
.demo-card p { color: var(--text-muted); margin-bottom: 20px; }
.demo-meta {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 8px;
    background: rgba(124,58,237,0.15);
    color: var(--primary-light);
    font-size: 13px;
    font-family: "Courier New", monospace;
    margin-bottom: 20px;
}

/* ==========================================================================
   CTA 大横幅
   ========================================================================== */
.cta-band {
    background: var(--grad-primary);
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}
.cta-band::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.2), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(6,182,212,0.4), transparent 40%);
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { font-size: 36px; font-weight: 800; margin-bottom: 16px; }
.cta-band p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; }
.cta-band .btn {
    background: #fff;
    color: var(--primary);
    font-size: 18px;
}
.cta-band .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border);
    padding: 64px 0 32px;
    background: rgba(15, 5, 36, 0.6);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; max-width: 320px; }
.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text-main);
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); font-size: 14px; }
.footer-col ul li a:hover { color: var(--primary-light); }

.footer-contact li {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 12px;
    display: flex;
    gap: 8px;
    align-items: flex-start;
}
.footer-contact li strong { color: var(--text-main); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-dim);
    font-size: 13px;
    flex-wrap: wrap;
    gap: 12px;
}

/* ==========================================================================
   滚动浮现动画
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 页面通用标题(非首页) */
.page-hero {
    padding: calc(var(--nav-height) + 80px) 0 60px;
    text-align: center;
}
.page-hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--grad-glow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.page-hero p { color: var(--text-muted); font-size: 18px; max-width: 640px; margin: 0 auto; }

/* ==========================================================================
   二维码容器(防遮挡 + 可放大)
   ========================================================================== */
.qr-box {
    width: 200px; height: 200px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
    z-index: 10;
    cursor: zoom-in;
}
.qr-box:hover { border-color: var(--primary-light); box-shadow: var(--shadow-glow); transform: scale(1.03); }
.qr-box img { width: 100%; height: 100%; object-fit: contain; }

/* 二维码放大弹窗 */
.qr-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 5, 36, 0.92);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 20px;
}
.qr-modal.open { display: flex; }
.qr-modal-img {
    background: #fff;
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: 0 0 60px rgba(124, 58, 237, 0.5);
    transition: transform 0.2s ease;
}
.qr-modal-img img {
    display: block;
    width: 320px; height: 320px;
    object-fit: contain;
}
.qr-modal-hint {
    color: var(--text-muted);
    font-size: 14px;
}
.qr-modal-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}
.qr-modal-controls button {
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.qr-modal-controls button:hover { background: var(--primary); border-color: transparent; }
.qr-modal-close {
    position: absolute;
    top: 24px; right: 24px;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 22px;
    cursor: pointer;
}

/* 大号电话按钮 */
.call-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    border-radius: 100px;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 4px 24px rgba(34, 197, 94, 0.4);
    transition: var(--transition);
}
.call-btn:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 8px 32px rgba(34,197,94,0.6); }
.call-btn .num { font-family: "Courier New", monospace; letter-spacing: 1px; }

/* 浮动客服栏(固定右下角) */
.float-contact {
    position: fixed;
    right: 24px; bottom: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.float-btn {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    box-shadow: 0 4px 20px rgba(124,58,237,0.5);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}
.float-btn:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(236,72,153,0.6); }
.float-btn.green { background: linear-gradient(135deg, #22c55e, #16a34a); box-shadow: 0 4px 20px rgba(34,197,94,0.5); }
.float-btn .tooltip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    color: var(--text-main);
}
.float-btn:hover .tooltip { opacity: 1; right: 66px; }

@media (max-width: 768px) {
    .float-contact { right: 14px; bottom: 14px; }
    .float-btn { width: 48px; height: 48px; font-size: 19px; }
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
    .hero h1 { font-size: 48px; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .price-grid { grid-template-columns: 1fr; max-width: 480px; }
    .price-card.featured { transform: none; }
    .price-card.featured:hover { transform: translateY(-6px); }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--nav-height); left: 0; right: 0;
        background: rgba(15, 5, 36, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 6px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-150%);
        transition: transform 0.3s;
    }
    .nav-menu.open { transform: translateY(0); }
    .nav-menu a { padding: 14px 16px; width: 100%; }
    .nav-cta { display: none; }
    .nav-toggle { display: flex; }

    .hero h1 { font-size: 36px; }
    .hero-sub { font-size: 17px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 64px 0; }
    .section-head h2 { font-size: 30px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: 1fr; }
    .cta-band { padding: 40px 24px; }
    .cta-band h2 { font-size: 26px; }

    /* 时间轴改单列 */
    .history-timeline::before { left: 20px; }
    .ht-item { width: 100%; left: 0 !important; text-align: left !important; padding: 0 0 40px 50px; }
    .ht-item .ht-dot { left: 11px !important; right: auto !important; }

    .compare { font-size: 14px; }
    .compare th, .compare td { padding: 14px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
}