/* ==========================================================
   知光互动 · 粉紫黑洞主题设计系统
   Cosmic Pink-Purple Design Tokens
   ========================================================== */

:root {
    /* ---- 色彩：粉紫黑洞 ---- */
    --cosmic-bg: #07030F;
    --cosmic-bg-2: #0E0420;
    --cosmic-bg-3: #1A0B3A;

    --pink-50:  #FFF0F8;
    --pink-100: #FFD6EC;
    --pink-200: #FFA8D8;
    --pink-300: #FF7ABF;
    --pink-400: #FF4DA8;
    --pink-500: #EC4899;
    --pink-600: #DB2777;
    --pink-700: #BE185D;

    --purple-50:  #FAF5FF;
    --purple-100: #F3E8FF;
    --purple-200: #E9D5FF;
    --purple-300: #D8B4FE;
    --purple-400: #C084FC;
    --purple-500: #A855F7;
    --purple-600: #9333EA;
    --purple-700: #7E22CE;
    --purple-800: #6B21A8;
    --purple-900: #4C1D95;

    /* ---- 文字（深色主题默认） ---- */
    --text-primary: #F5F3FF;
    --text-secondary: #D8B4FE;
    --text-muted: #A78BFA;
    --text-dim: #6B21A8;

    /* ---- 边框 ---- */
    --border-subtle: rgba(236, 72, 153, 0.12);
    --border-soft:   rgba(168, 85, 247, 0.22);
    --border-strong: rgba(168, 85, 247, 0.45);

    /* ---- 渐变 ---- */
    --grad-primary:   linear-gradient(135deg, #FF4DA8 0%, #A855F7 50%, #6B21A8 100%);
    --grad-pink:      linear-gradient(135deg, #FF7ABF 0%, #EC4899 100%);
    --grad-purple:    linear-gradient(135deg, #C084FC 0%, #7E22CE 100%);
    --grad-cosmic:    linear-gradient(135deg, #0E0420 0%, #2D1B69 50%, #0E0420 100%);
    --grad-radial:    radial-gradient(circle at 30% 30%, rgba(236, 72, 153, 0.25), transparent 60%);
    --grad-text:      linear-gradient(135deg, #FFB6E0 0%, #FF4DA8 35%, #A855F7 70%, #6B21A8 100%);

    /* ---- 阴影 ---- */
    --shadow-pink:    0 8px 40px rgba(236, 72, 153, 0.35);
    --shadow-purple:  0 12px 48px rgba(124, 34, 206, 0.4);
    --shadow-cosmic:  0 0 80px rgba(168, 85, 247, 0.25);
    --shadow-glow:    0 0 60px rgba(255, 122, 191, 0.5);

    /* ---- 字体 ---- */
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
    --font-display: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;

    /* ---- 圆角 ---- */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
    --radius-full: 999px;

    /* ---- 间距尺度 ---- */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    --space-9: 96px;
    --space-10: 128px;

    /* ---- 动效 ---- */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --ease-elastic: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 200ms;
    --duration-base: 350ms;
    --duration-slow: 600ms;
    --duration-cinematic: 1200ms;

    /* ---- 布局 ---- */
    --container: 1280px;
    --container-narrow: 960px;
    --nav-height: 72px;
}

/* ==========================================================
   亮色主题 (Light)
   ========================================================== */
[data-theme="light"] {
    --cosmic-bg: #FFF8FC;
    --cosmic-bg-2: #FCEAF5;
    --cosmic-bg-3: #F3E8FF;

    --text-primary: #2D1B69;
    --text-secondary: #6B21A8;
    --text-muted: #9333EA;
    --text-dim: #C084FC;

    --border-subtle: rgba(168, 85, 247, 0.14);
    --border-soft:   rgba(168, 85, 247, 0.24);
    --border-strong: rgba(168, 85, 247, 0.5);

    --grad-cosmic: linear-gradient(135deg, #FFF8FC 0%, #FCEAF5 50%, #F3E8FF 100%);
}

/* ==========================================================
   全局基础
   ========================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--cosmic-bg);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--duration-slow) var(--ease-out),
                color var(--duration-slow) var(--ease-out);
    min-height: 100vh;
    position: relative;
}

/* 背景星云层（CSS 绘制） */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(236, 72, 153, 0.18), transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.18), transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(124, 34, 206, 0.08), transparent 60%);
    pointer-events: none;
    z-index: -2;
    animation: nebula-drift 30s infinite alternate ease-in-out;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 30% 60%, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(1px 1px at 70% 30%, rgba(255, 200, 240, 0.5), transparent),
        radial-gradient(1px 1px at 90% 70%, rgba(216, 180, 254, 0.5), transparent),
        radial-gradient(1px 1px at 50% 90%, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(2px 2px at 15% 80%, rgba(236, 72, 153, 0.4), transparent),
        radial-gradient(2px 2px at 85% 15%, rgba(168, 85, 247, 0.4), transparent);
    background-size: 600px 600px;
    pointer-events: none;
    z-index: -1;
    animation: starfield 120s linear infinite;
    opacity: 0.6;
}

[data-theme="light"] body::before {
    background:
        radial-gradient(ellipse at 20% 10%, rgba(236, 72, 153, 0.08), transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.08), transparent 50%);
}

[data-theme="light"] body::after {
    opacity: 0.2;
}

@keyframes nebula-drift {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(40px, -30px) scale(1.05); }
    100% { transform: translate(-30px, 30px) scale(1); }
}

@keyframes starfield {
    0%   { background-position: 0 0; }
    100% { background-position: 600px 600px; }
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

::selection {
    background: rgba(236, 72, 153, 0.4);
    color: #fff;
}

/* ==========================================================
   工具类
   ========================================================== */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

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

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

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 2px;
    margin-bottom: var(--space-5);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-4);
    letter-spacing: -0.5px;
}

.section-sub {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 720px;
    margin: 0 auto var(--space-8);
    line-height: 1.8;
}

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

/* ==========================================================
   按钮
   ========================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--duration-base) var(--ease-out);
    cursor: pointer;
    border: 1px solid transparent;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    box-shadow: var(--shadow-pink);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #FF7ABF, #C084FC);
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out);
}

.btn-primary > * { position: relative; z-index: 1; }

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover::before { opacity: 1; }

.btn-ghost {
    background: rgba(168, 85, 247, 0.08);
    color: var(--text-primary);
    border-color: var(--border-soft);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(168, 85, 247, 0.15);
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

.btn-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 磁吸按钮效果（CSS-only 模拟） */
.magnetic {
    transition: transform var(--duration-base) var(--ease-out);
}

.magnetic:hover {
    transform: scale(1.04) translateY(-2px);
}

/* ==========================================================
   玻璃态容器
   ========================================================== */
.glass {
    background: rgba(168, 85, 247, 0.04);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
}

.glass-strong {
    background: rgba(14, 4, 32, 0.75);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
    border: 1px solid var(--border-soft);
}

[data-theme="light"] .glass-strong {
    background: rgba(255, 248, 252, 0.85);
}

/* ==========================================================
   导航栏
   ========================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(7, 3, 15, 0.55);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
    background: rgba(7, 3, 15, 0.85);
    box-shadow: 0 4px 30px rgba(168, 85, 247, 0.15);
}

[data-theme="light"] .navbar {
    background: rgba(255, 248, 252, 0.7);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 248, 252, 0.9);
}

.nav-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-brand img {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    object-fit: cover;
    filter: drop-shadow(0 0 12px rgba(236, 72, 153, 0.5));
    transition: transform var(--duration-base) var(--ease-elastic);
}

.nav-brand:hover img {
    transform: rotate(15deg) scale(1.1);
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.nav-brand-text strong {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-brand-text small {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-links a {
    display: block;
    padding: 10px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--duration-base) var(--ease-out);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(168, 85, 247, 0.1);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--pink-500);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--pink-500);
}

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

.nav-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-full);
    transition: all var(--duration-base) var(--ease-out);
}

.nav-phone:hover {
    background: rgba(236, 72, 153, 0.2);
    border-color: var(--pink-500);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(236, 72, 153, 0.25);
}

/* 主题切换 */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid var(--border-soft);
    border-radius: 50%;
    transition: all var(--duration-base) var(--ease-out);
    font-size: 1.1rem;
}

.theme-toggle:hover {
    background: rgba(236, 72, 153, 0.15);
    transform: rotate(20deg);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-base) var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================
   Hero 区
   ========================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + var(--space-9)) var(--space-5) var(--space-9);
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.85;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    animation: fade-in-up 0.8s var(--ease-out) both;
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--pink-500);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%   { box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.7); }
    70%  { box-shadow: 0 0 0 14px rgba(236, 72, 153, 0); }
    100% { box-shadow: 0 0 0 0 rgba(236, 72, 153, 0); }
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4.8rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: var(--space-5);
    animation: fade-in-up 0.9s var(--ease-out) 0.1s both;
}

.hero-title .line {
    display: block;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto var(--space-6);
    animation: fade-in-up 1s var(--ease-out) 0.2s both;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
    animation: fade-in-up 1.1s var(--ease-out) 0.3s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-9);
    padding: var(--space-6);
    border-radius: var(--radius-2xl);
    background: rgba(14, 4, 32, 0.4);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(20px);
    animation: fade-in-up 1.2s var(--ease-out) 0.4s both;
}

[data-theme="light"] .hero-stats {
    background: rgba(255, 248, 252, 0.6);
}

.hero-stat-value {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--space-2);
}

.hero-stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: bounce 2.5s infinite;
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 32px;
    background: linear-gradient(180deg, var(--pink-500), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50%      { transform: translate(-50%, 8px); }
}

/* ==========================================================
   通用 Section
   ========================================================== */
section {
    padding: var(--space-10) 0;
    position: relative;
}

.section-head {
    text-align: center;
    margin-bottom: var(--space-9);
}

.section-head .section-tag {
    animation: fade-in-up 0.7s var(--ease-out) both;
}

.section-head .section-title {
    animation: fade-in-up 0.8s var(--ease-out) 0.1s both;
}

.section-head .section-sub {
    animation: fade-in-up 0.9s var(--ease-out) 0.2s both;
}

/* ==========================================================
   服务卡片
   ========================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-5);
}

.service-card {
    position: relative;
    padding: var(--space-7) var(--space-6);
    background: linear-gradient(160deg, rgba(168, 85, 247, 0.06), rgba(236, 72, 153, 0.02));
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--duration-base) var(--ease-out);
    cursor: pointer;
    isolation: isolate;
}

.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(236, 72, 153, 0.15), transparent 50%);
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out);
    z-index: -1;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--grad-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-slow) var(--ease-out);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-cosmic);
}

.service-card:hover::before { opacity: 1; }
.service-card:hover::after { transform: scaleX(1); }

.service-icon {
    width: 60px;
    height: 60px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-primary);
    border-radius: var(--radius-md);
    font-size: 1.8rem;
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-pink);
    transition: transform var(--duration-base) var(--ease-elastic);
}

.service-card:hover .service-icon {
    transform: rotate(-8deg) scale(1.1);
}

.service-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
    letter-spacing: -0.3px;
}

.service-desc {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-5);
    font-size: 0.95rem;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--space-5);
}

.service-tag {
    font-size: 0.75rem;
    padding: 4px 12px;
    background: rgba(168, 85, 247, 0.1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--pink-400);
    transition: gap var(--duration-base) var(--ease-out);
}

.service-card:hover .service-link {
    gap: 12px;
}

/* ==========================================================
   优势区
   ========================================================== */
.advantages-section {
    background: var(--cosmic-bg-2);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-5);
}

.advantage-item {
    text-align: center;
    padding: var(--space-7) var(--space-5);
    border-radius: var(--radius-xl);
    background: rgba(168, 85, 247, 0.04);
    border: 1px solid var(--border-subtle);
    transition: all var(--duration-base) var(--ease-out);
}

.advantage-item:hover {
    transform: translateY(-6px);
    background: rgba(168, 85, 247, 0.08);
    border-color: var(--border-soft);
    box-shadow: 0 16px 48px rgba(168, 85, 247, 0.12);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-5);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(236, 72, 153, 0.1);
    border: 1px solid rgba(236, 72, 153, 0.25);
    border-radius: 50%;
    font-size: 2.2rem;
    transition: transform var(--duration-slow) var(--ease-elastic);
}

.advantage-item:hover .advantage-icon {
    transform: scale(1.15) rotate(360deg);
    background: var(--grad-primary);
}

.advantage-item h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.advantage-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================================
   流程
   ========================================================== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-5);
    position: relative;
}

.process-item {
    position: relative;
    padding: var(--space-6);
    background: rgba(168, 85, 247, 0.04);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--duration-base) var(--ease-out);
}

.process-item:hover {
    transform: translateY(-4px);
    background: rgba(236, 72, 153, 0.08);
    border-color: var(--border-strong);
}

.process-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--grad-primary);
    color: #fff;
    font-weight: 800;
    font-size: 1.2rem;
    border-radius: 50%;
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-pink);
}

.process-item h5 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.process-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ==========================================================
   数据展示
   ========================================================== */
.stats-section {
    background: var(--cosmic-bg-3);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(236, 72, 153, 0.12), transparent 70%);
    pointer-events: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-6);
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: var(--space-5);
}

.stat-value {
    font-size: clamp(2.2rem, 4vw, 3.5rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--space-3);
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* ==========================================================
   客户案例
   ========================================================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-5);
}

.case-card {
    position: relative;
    padding: var(--space-6);
    background: linear-gradient(160deg, rgba(168, 85, 247, 0.06), rgba(14, 4, 32, 0.4));
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--duration-base) var(--ease-out);
}

.case-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    box-shadow: 0 20px 60px rgba(168, 85, 247, 0.15);
}

.case-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(236, 72, 153, 0.15);
    color: var(--pink-300);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.case-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.case-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.case-metrics {
    display: flex;
    gap: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-subtle);
}

.case-metric {
    flex: 1;
}

.case-metric strong {
    display: block;
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--grad-pink);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2px;
}

.case-metric span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================================
   CTA 区
   ========================================================== */
.cta-section {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card {
    position: relative;
    padding: var(--space-9) var(--space-7);
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.12), rgba(236, 72, 153, 0.08));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    isolation: isolate;
}

.cta-card::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg, transparent, var(--pink-500), transparent, var(--purple-500), transparent);
    animation: rotate 12s linear infinite;
    z-index: -2;
    opacity: 0.4;
}

.cta-card::after {
    content: '';
    position: absolute;
    inset: 2px;
    background: var(--cosmic-bg-2);
    border-radius: calc(var(--radius-2xl) - 2px);
    z-index: -1;
}

[data-theme="light"] .cta-card::after {
    background: var(--cosmic-bg);
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.cta-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: var(--space-4);
}

.cta-sub {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: var(--space-7);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
}

.cta-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--pink-300);
    padding: 14px 32px;
    background: rgba(236, 72, 153, 0.1);
    border: 1px solid var(--pink-500);
    border-radius: var(--radius-full);
    transition: all var(--duration-base) var(--ease-out);
}

.cta-phone:hover {
    background: var(--pink-500);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ==========================================================
   Footer
   ========================================================== */
.footer {
    background: var(--cosmic-bg);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-9) 0 var(--space-5);
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: var(--space-7);
    margin-bottom: var(--space-7);
}

.footer-brand {
    max-width: 360px;
}

.footer-brand img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    margin-bottom: var(--space-4);
    filter: drop-shadow(0 0 16px rgba(236, 72, 153, 0.4));
}

.footer-brand h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.footer-col h5 {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    font-weight: 600;
    letter-spacing: 1px;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-col a:hover {
    color: var(--pink-400);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: var(--space-3);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-contact-item .icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(236, 72, 153, 0.1);
    border-radius: 50%;
    color: var(--pink-400);
}

.footer-bottom {
    padding-top: var(--space-5);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.footer-bottom a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-bottom a:hover {
    color: var(--pink-400);
}

/* ==========================================================
   浮动拨号按钮
   ========================================================== */
.float-phone {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    width: 60px;
    height: 60px;
    background: var(--grad-primary);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.6rem;
    box-shadow: var(--shadow-pink);
    transition: all var(--duration-base) var(--ease-out);
    animation: float-pulse 3s infinite;
}

.float-phone:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-glow);
}

@keyframes float-pulse {
    0%, 100% { box-shadow: 0 8px 36px rgba(236, 72, 153, 0.4), 0 0 0 0 rgba(236, 72, 153, 0.5); }
    50%      { box-shadow: 0 8px 36px rgba(236, 72, 153, 0.4), 0 0 0 16px rgba(236, 72, 153, 0); }
}

/* ==========================================================
   滚动渐显
   ========================================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 1024px) {
    :root {
        --space-10: 96px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
        --space-9: 64px;
        --space-10: 80px;
    }

    .nav-links,
    .nav-phone {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links.mobile-open {
        display: flex;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: var(--space-4);
        background: rgba(7, 3, 15, 0.95);
        backdrop-filter: blur(30px);
        border-bottom: 1px solid var(--border-soft);
    }

    [data-theme="light"] .nav-links.mobile-open {
        background: rgba(255, 248, 252, 0.95);
    }

    .nav-links.mobile-open a {
        padding: 14px 18px;
        border-radius: var(--radius-md);
    }

    .float-phone {
        display: flex;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cta-card {
        padding: var(--space-6) var(--space-4);
    }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}