/* ================================================================
   字体
   ================================================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ================================================================
   主题变量
   ================================================================ */
:root {
    --bg-body: #f0f4fb;
    --bg-glass: rgba(255,255,255,0.35);
    --bg-glass-hover: rgba(255,255,255,0.6);
    --bg-card: rgba(255,255,255,0.45);
    --bg-card-hover: rgba(255,255,255,0.7);
    --border-glass: rgba(255,255,255,0.35);
    --border-glass-hover: rgba(255,255,255,0.55);
    --text-primary: #1a1a2e;
    --text-secondary: rgba(0,0,0,0.42);
    --text-muted: rgba(0,0,0,0.12);
    --shadow-glass: 0 8px 48px rgba(0,0,0,0.06);
    --shadow-glass-hover: 0 20px 64px rgba(0,0,0,0.10);
    --glow-color: rgba(0,102,255,0.05);
    --section-border: rgba(0,0,0,0.03);
    --badge-bg: rgba(0,102,255,0.06);
    --badge-border: rgba(0,102,255,0.08);
    --badge-text: #0066ff;
    --step-link: #0066ff;
    --footer-border: rgba(0,0,0,0.04);
    --footer-text: rgba(0,0,0,0.15);
    --cta-bg: rgba(0,102,255,0.02);
    --cta-border: rgba(0,0,0,0.03);
    --wave-fill: rgba(0,0,0,0.02);
    --cursor-glow: rgba(0,102,255,0.06);
    --gradient-start: rgba(0,102,255,0.02);
    --gradient-end: rgba(119,68,255,0.02);
}

body.light-mode {
    --bg-body: #f0f4fb;
    --bg-glass: rgba(255,255,255,0.35);
    --bg-glass-hover: rgba(255,255,255,0.6);
    --bg-card: rgba(255,255,255,0.45);
    --bg-card-hover: rgba(255,255,255,0.7);
    --border-glass: rgba(255,255,255,0.35);
    --text-primary: #1a1a2e;
    --text-secondary: rgba(0,0,0,0.42);
    --shadow-glass: 0 8px 48px rgba(0,0,0,0.06);
    --glow-color: rgba(0,102,255,0.05);
    --cursor-glow: rgba(0,102,255,0.06);
}

body:not(.light-mode) {
    --bg-body: #080c18;
    --bg-glass: rgba(255,255,255,0.03);
    --bg-glass-hover: rgba(255,255,255,0.07);
    --bg-card: rgba(255,255,255,0.025);
    --bg-card-hover: rgba(255,255,255,0.05);
    --border-glass: rgba(255,255,255,0.05);
    --border-glass-hover: rgba(255,255,255,0.10);
    --text-primary: #e8edf5;
    --text-secondary: rgba(255,255,255,0.45);
    --text-muted: rgba(255,255,255,0.12);
    --shadow-glass: 0 8px 48px rgba(0,0,0,0.35);
    --shadow-glass-hover: 0 20px 64px rgba(0,0,0,0.45);
    --glow-color: rgba(0,102,255,0.12);
    --section-border: rgba(255,255,255,0.02);
    --badge-bg: rgba(77,140,255,0.10);
    --badge-border: rgba(77,140,255,0.12);
    --badge-text: #4d8cff;
    --step-link: #4d8cff;
    --footer-border: rgba(255,255,255,0.03);
    --footer-text: rgba(255,255,255,0.12);
    --cta-bg: rgba(0,102,255,0.025);
    --cta-border: rgba(255,255,255,0.02);
    --wave-fill: rgba(255,255,255,0.02);
    --cursor-glow: rgba(77,140,255,0.10);
    --gradient-start: rgba(0,102,255,0.015);
    --gradient-end: rgba(119,68,255,0.015);
}

/* ================================================================
   鼠标光晕 + 拖尾
   ================================================================ */
.cursor-glow {
    position: fixed;
    pointer-events: none;
    z-index: 9998;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--cursor-glow), transparent 70%);
    transform: translate(-50%, -50%);
    will-change: transform, left, top;
    transition: none;
}

.cursor-trail {
    position: fixed;
    pointer-events: none;
    z-index: 9997;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.cursor-trail span {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,102,255,0.15), transparent);
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    will-change: transform, left, top;
}

/* ================================================================
   全局加载 - 修复手机偏移Bug
   ================================================================ */
.global-loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: var(--bg-body);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.8s cubic-bezier(0.65, 0, 0.35, 1);
    overflow: hidden;
    will-change: transform, opacity;
}
.global-loader.loaded {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.04);
}
.loader-container {
    text-align: center;
    position: relative;
    z-index: 2;
    transform: translateZ(0);
    backface-visibility: hidden;
}
.loader-ring {
    width: 100px;
    height: 100px;
    margin: 0 auto 28px;
    position: relative;
    border-radius: 50%;
    border: 2px solid var(--border-glass);
    animation: loaderSpin 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) infinite;
    will-change: transform;
}
.loader-ring-inner {
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: #0066ff;
    border-bottom-color: #7744ff;
    animation: loaderSpin 0.8s linear infinite reverse;
    will-change: transform;
}
@keyframes loaderSpin { 100% { transform: rotate(360deg); } }
.loader-logo-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 22px;
    transform: translateZ(0);
}
.loader-brand {
    display: flex;
    align-items: center;
    gap: 6px;
}
.loader-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.loader-badge {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 10px;
    border-radius: 40px;
    background: linear-gradient(135deg, #0066ff, #7744ff);
    color: #fff;
}
.loader-progress {
    width: 200px;
    height: 3px;
    background: var(--border-glass);
    border-radius: 10px;
    margin: 0 auto 14px;
    overflow: hidden;
}
.loader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #0066ff, #7744ff, #cc44ff);
    border-radius: 10px;
    transition: width 0.3s ease;
}
.loader-text {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 1px;
}
.loader-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}
.loader-particle {
    position: absolute;
    border-radius: 50%;
    background: var(--border-glass);
    animation: loaderParticleFloat 4s ease-in-out infinite alternate;
    will-change: transform, opacity;
}
@keyframes loaderParticleFloat {
    100% { transform: translate(40px, -60px) scale(0.3); opacity: 0; }
}

/* ================================================================
   滚动加载动画 - 更流畅
   ================================================================ */
.scroll-anim {
    opacity: 0;
    transition: all 0.9s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity;
}
.anim-fade-up { transform: translateY(60px); }
.anim-fade-up.anim-visible { opacity: 1; transform: translateY(0); }
.anim-fade-left { transform: translateX(-80px); }
.anim-fade-left.anim-visible { opacity: 1; transform: translateX(0); }
.anim-fade-right { transform: translateX(80px); }
.anim-fade-right.anim-visible { opacity: 1; transform: translateX(0); }
.anim-scale { transform: scale(0.85); }
.anim-scale.anim-visible { opacity: 1; transform: scale(1); }

.scroll-anim .timeline-item,
.scroll-anim .feat {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity;
}
.scroll-anim.anim-visible .timeline-item,
.scroll-anim.anim-visible .feat {
    opacity: 1;
    transform: translateY(0);
}
.scroll-anim.anim-visible .timeline-item:nth-child(1),
.scroll-anim.anim-visible .feat:nth-child(1) { transition-delay: 0.08s; }
.scroll-anim.anim-visible .timeline-item:nth-child(2),
.scroll-anim.anim-visible .feat:nth-child(2) { transition-delay: 0.16s; }
.scroll-anim.anim-visible .timeline-item:nth-child(3),
.scroll-anim.anim-visible .feat:nth-child(3) { transition-delay: 0.24s; }

/* 英雄区 - 错开出现 */
.hero .hero-badge, .hero h1, .hero p, .hero-btns, .hero-stats,
.hero .floating-card, .hero .orbit {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity;
}
.hero.anim-visible .hero-badge { transition-delay: 0.04s; opacity: 1; transform: translateY(0); }
.hero.anim-visible h1 { transition-delay: 0.10s; opacity: 1; transform: translateY(0); }
.hero.anim-visible p { transition-delay: 0.16s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .hero-btns { transition-delay: 0.22s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .hero-stats { transition-delay: 0.28s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .c1 { transition-delay: 0.12s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .c2 { transition-delay: 0.20s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .c3 { transition-delay: 0.28s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .c4 { transition-delay: 0.36s; opacity: 1; transform: translateY(0); }
.hero.anim-visible .orbit { transition-delay: 0.24s; opacity: 1; transform: translateY(0); }
.hero .floating-card, .hero .orbit { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1); will-change: transform, opacity; }
.hero.anim-ready { opacity: 1; }
.hero.anim-ready .hero-badge, .hero.anim-ready h1, .hero.anim-ready p,
.hero.anim-ready .hero-btns, .hero.anim-ready .hero-stats,
.hero.anim-ready .floating-card, .hero.anim-ready .orbit {
    opacity: 1;
    transform: translateY(0);
}
.hero.anim-ready .hero-badge { transition-delay: 0.04s; }
.hero.anim-ready h1 { transition-delay: 0.10s; }
.hero.anim-ready p { transition-delay: 0.16s; }
.hero.anim-ready .hero-btns { transition-delay: 0.22s; }
.hero.anim-ready .hero-stats { transition-delay: 0.28s; }
.hero.anim-ready .c1 { transition-delay: 0.12s; }
.hero.anim-ready .c2 { transition-delay: 0.20s; }
.hero.anim-ready .c3 { transition-delay: 0.28s; }
.hero.anim-ready .c4 { transition-delay: 0.36s; }
.hero.anim-ready .orbit { transition-delay: 0.24s; }

/* ================================================================
   极光背景
   ================================================================ */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: var(--bg-body);
    background-image:
        radial-gradient(ellipse at 0% 20%, var(--gradient-start) 0px, transparent 50%),
        radial-gradient(ellipse at 100% 80%, var(--gradient-end) 0px, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(0,200,255,0.03) 0px, transparent 40%);
    animation: aurora 20s ease-in-out infinite alternate;
    will-change: background-position, opacity;
}
@keyframes aurora {
    0% { background-position: 0% 0%, 100% 100%, 50% 100%; opacity:0.8; }
    50% { background-position: 40% 20%, 60% 80%, 70% 60%; opacity:1; }
    100% { background-position: 100% 60%, 0% 40%, 80% 20%; opacity:0.9; }
}

/* ================================================================
   基础
   ================================================================ */
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    background: var(--bg-body);
    overflow-x: hidden;
    transition: background 0.6s ease, color 0.6s ease;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: var(--badge-text); transition: 0.25s; }
a:hover { opacity: 0.8; }

/* ================================================================
   按钮
   ================================================================ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 34px;
    background: linear-gradient(135deg, #0066ff, #7744ff);
    color: #fff !important;
    border-radius: 14px;
    font-weight: 600;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(0,102,255,0.20);
    position: relative;
    overflow: hidden;
    will-change: transform, box-shadow;
}
.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.12) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: 0.7s;
}
.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0,102,255,0.28);
    color: #fff !important;
}
.btn-glass {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 34px;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-primary) !important;
    border-radius: 14px;
    font-weight: 600;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--border-glass);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.btn-glass:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-glass-hover);
    transform: translateY(-3px);
    color: var(--text-primary) !important;
}

/* ================================================================
   英雄区
   ================================================================ */
.hero {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}
.hero-bg-glow {
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--glow-color), transparent 70%);
    border-radius: 50%;
    animation: glowPulse 6s ease-in-out infinite alternate;
    will-change: transform, opacity;
}
@keyframes glowPulse { 100% { transform: scale(1.3); opacity: 1; } }
.hero-inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}
.hero-text { flex: 1; }
.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    background: var(--badge-bg);
    border: 1px solid var(--badge-border);
    border-radius: 40px;
    font-size: 13px;
    color: var(--badge-text);
    font-weight: 500;
    margin-bottom: 16px;
}
.hero-text h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.02em;
}
.hero-text h1 span {
    background: linear-gradient(135deg, #0066ff, #7744ff, #cc44ff);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 4s ease-in-out infinite;
}
@keyframes gradientShift { 50% { background-position: 100% 50%; } }
.hero-text h1 .typewriter {
    -webkit-text-fill-color: var(--text-primary);
    background: none;
}
.hero-text p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 440px;
    line-height: 1.8;
    margin-bottom: 30px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats {
    display: flex;
    gap: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--section-border);
}
.hero-stats span {
    font-size: 14px;
    color: var(--text-secondary);
}
.hero-stats strong {
    display: block;
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
}
.hero-visual {
    flex: 0 0 300px;
    height: 380px;
    position: relative;
}
.floating-card {
    position: absolute;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 14px 22px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: default;
    animation: floatAround 8s ease-in-out infinite;
    will-change: transform;
}
.floating-card i { color: var(--badge-text); font-size: 16px; }
.floating-card:hover {
    transform: scale(1.08) !important;
    background: var(--bg-glass-hover);
    border-color: var(--border-glass-hover);
}
.c1 { top: 0; left: 0; animation-delay: 0s; }
.c2 { top: 20%; right: 0; animation-delay: 1.5s; }
.c3 { bottom: 20%; left: 10%; animation-delay: 3s; }
.c4 { bottom: 0; right: 10%; animation-delay: 4.5s; }
@keyframes floatAround { 50% { transform: translateY(-12px); } }
.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
}
.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    width: 220px;
    height: 220px;
    animation: spin 20s linear infinite;
    will-change: transform;
}
.orbit-ring:nth-child(2) {
    width: 160px;
    height: 160px;
    animation-duration: 14s;
    animation-direction: reverse;
}
@keyframes spin { 100% { transform: translate(-50%, -50%) rotate(360deg); } }
.orbit-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, #0066ff, #7744ff);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0,102,255,0.3);
    animation: orbitMove 10s linear infinite;
}
@keyframes orbitMove { 50% { transform: scale(1.5); opacity: 0.6; } }
.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    pointer-events: none;
}
.hero-wave path { fill: var(--wave-fill); }

/* ================================================================
   步骤 - 时间线
   ================================================================ */
.steps {
    width: 100%;
    padding: 80px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--section-border);
    border-bottom: 1px solid var(--section-border);
}
.steps-inner { max-width: 1100px; margin: 0 auto; }
.sec-head {
    text-align: center;
    margin-bottom: 50px;
}
.sec-head span {
    display: inline-block;
    padding: 4px 18px;
    background: var(--badge-bg);
    color: var(--badge-text);
    border-radius: 40px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 10px;
    border: 1px solid var(--badge-border);
}
.sec-head h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.02em;
}
.sec-head p { color: var(--text-secondary); font-size: 16px; }
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 40px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 30px;
    bottom: 30px;
    width: 2px;
    background: linear-gradient(to bottom, var(--badge-text), var(--border-glass));
}
.timeline-item {
    position: relative;
    padding: 20px 0 20px 40px;
}
.timeline-dot {
    position: absolute;
    left: -33px;
    top: 28px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0066ff, #7744ff);
    border: 3px solid var(--bg-body);
    box-shadow: 0 0 0 4px var(--badge-bg);
    z-index: 2;
}
.timeline-line {
    position: absolute;
    left: -26px;
    top: 42px;
    bottom: 0;
    width: 2px;
    background: var(--border-glass);
}
.timeline-item:last-child .timeline-line { display: none; }
.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 24px 28px;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.timeline-content:hover {
    transform: translateX(8px);
    background: var(--bg-card-hover);
    border-color: var(--border-glass-hover);
    box-shadow: var(--shadow-glass-hover);
}
.timeline-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--badge-text);
    letter-spacing: 1px;
    text-transform: uppercase;
}
.timeline-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--badge-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--badge-text);
    margin: 8px 0 10px;
}
.timeline-content h3 { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.timeline-content p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.step-link {
    display: inline-block;
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--step-link);
}

/* ================================================================
   优势 - 大号数字
   ================================================================ */
.features {
    width: 100%;
    padding: 80px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.features-inner { max-width: 1100px; margin: 0 auto; }
.feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feat {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}
.feat-bg {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, var(--glow-color), transparent 70%);
    opacity: 0;
    transition: 0.7s;
}
.feat:hover .feat-bg { opacity: 1; }
.feat:hover {
    transform: translateY(-6px);
    border-color: var(--border-glass-hover);
    background: var(--bg-card-hover);
}
.feat-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--badge-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--badge-text);
    margin: 0 auto 14px;
}
.feat-number {
    font-size: 44px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 4px;
    font-family: 'Inter', sans-serif;
}
.feat-number .stat-number {
    background: linear-gradient(135deg, #0066ff, #7744ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.feat h3 { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.feat p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ================================================================
   CTA
   ================================================================ */
.cta {
    width: 100%;
    padding: 80px 24px;
    position: relative;
    background: var(--cta-bg);
    border-top: 1px solid var(--cta-border);
    border-bottom: 1px solid var(--cta-border);
    text-align: center;
    overflow: hidden;
    min-height: 400px;
}
#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--glow-color), transparent 70%);
    border-radius: 50%;
    animation: glowPulse 8s ease-in-out infinite alternate;
}
.cta-inner {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}
.cta h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.02em;
}
.cta p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}
.cta .btn-primary { padding: 16px 44px; font-size: 18px; }

/* ================================================================
   主题切换
   ================================================================ */
.theme-toggle-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-glass);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.theme-toggle-float:hover {
    transform: scale(1.1);
    background: var(--bg-glass-hover);
    box-shadow: var(--shadow-glass-hover);
}
.theme-toggle-float:active { transform: scale(0.9); }

/* ================================================================
   页脚
   ================================================================ */
.footer {
    width: 100%;
    padding: 50px 24px 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--section-border);
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--footer-border);
    margin-bottom: 20px;
}
.footer-brand p {
    font-size: 18px;
    font-weight: 700;
    margin-top: 0;
    color: var(--text-primary);
}
.footer-brand span { font-size: 14px; color: var(--text-secondary); }
.footer-grid h6 {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}
.footer-grid a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 4px 0;
    transition: 0.25s;
}
.footer-grid a:hover { color: var(--badge-text); }
.footer-bottom {
    text-align: center;
    font-size: 13px;
    color: var(--footer-text);
}
.footer-bottom a { color: var(--text-secondary); }
.footer-bottom a:hover { color: var(--badge-text); }

/* ================================================================
   响应式 - 完整适配
   ================================================================ */
@media (max-width: 1200px) {
    .hero-inner { gap: 40px; }
    .hero-text h1 { font-size: 44px; }
    .hero-visual { flex: 0 0 260px; height: 340px; }
    .floating-card { padding: 12px 18px; font-size: 13px; }
    .feat-number { font-size: 38px; }
    .footer-grid { gap: 30px; }
}

@media (max-width: 992px) {
    .hero { min-height: auto; padding: 100px 20px 60px; }
    .hero-inner { flex-direction: column; text-align: center; gap: 30px; }
    .hero-text h1 { font-size: 38px; }
    .hero-text p { max-width: 100%; margin: 0 auto 24px; font-size: 17px; }
    .hero-btns { justify-content: center; }
    .hero-stats { justify-content: center; gap: 30px; }
    .hero-stats strong { font-size: 22px; }
    .hero-visual { flex: unset; width: 100%; height: auto; min-height: 120px; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
    .floating-card { position: relative; top: unset !important; left: unset !important; right: unset !important; bottom: unset !important; animation: none !important; padding: 10px 16px; font-size: 13px; flex: 0 1 auto; }
    .orbit { display: none; }
    .hero-wave { display: none; }
    .steps { padding: 60px 20px; }
    .timeline { padding-left: 30px; }
    .timeline-item { padding-left: 30px; }
    .timeline-dot { left: -23px; width: 12px; height: 12px; }
    .timeline-line { left: -17px; }
    .features { padding: 60px 20px; }
    .feat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .feat-number { font-size: 34px; }
    .cta { padding: 60px 20px; min-height: 320px; }
    .cta h2 { font-size: 30px; }
    .footer { padding: 40px 20px 24px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .sec-head h2 { font-size: 28px; }
}

@media (max-width: 768px) {
    .hero { padding: 70px 16px 40px; }
    .hero-text h1 { font-size: 30px; }
    .hero-text p { font-size: 15px; margin-bottom: 20px; }
    .hero-btns { flex-direction: column; width: 100%; gap: 10px; }
    .hero-btns .btn-primary, .hero-btns .btn-glass { width: 100%; justify-content: center; padding: 14px 20px; font-size: 15px; }
    .hero-stats { flex-wrap: wrap; gap: 16px; padding-top: 20px; justify-content: center; }
    .hero-stats span { flex: 0 0 calc(50% - 8px); text-align: center; font-size: 13px; }
    .hero-stats strong { font-size: 20px; }
    .hero-visual { gap: 8px; min-height: 80px; }
    .floating-card { padding: 8px 14px; font-size: 12px; border-radius: 10px; gap: 6px; }
    .floating-card i { font-size: 13px; }
    .hero-badge { font-size: 11px; padding: 4px 14px; }
    .steps { padding: 40px 16px; }
    .sec-head { margin-bottom: 30px; }
    .sec-head h2 { font-size: 24px; }
    .sec-head p { font-size: 14px; }
    .timeline { padding-left: 24px; }
    .timeline::before { left: 10px; top: 24px; bottom: 24px; }
    .timeline-item { padding: 14px 0 14px 24px; }
    .timeline-dot { left: -19px; top: 22px; width: 10px; height: 10px; border-width: 2px; box-shadow: 0 0 0 3px var(--badge-bg); }
    .timeline-line { left: -13px; top: 32px; }
    .timeline-content { padding: 18px 20px; border-radius: 12px; }
    .timeline-content:hover { transform: translateX(4px); }
    .timeline-icon { width: 36px; height: 36px; font-size: 15px; margin: 4px 0 8px; }
    .timeline-content h3 { font-size: 16px; }
    .timeline-content p { font-size: 13px; }
    .features { padding: 40px 16px; }
    .feat-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .feat { padding: 24px 16px; border-radius: 14px; }
    .feat-icon { width: 44px; height: 44px; font-size: 18px; margin: 0 auto 10px; }
    .feat-number { font-size: 28px; }
    .feat h3 { font-size: 16px; }
    .feat p { font-size: 13px; }
    .cta { padding: 40px 16px; min-height: 280px; }
    .cta h2 { font-size: 24px; }
    .cta p { font-size: 15px; margin-bottom: 20px; }
    .cta .btn-primary { width: 100%; justify-content: center; padding: 14px 20px; font-size: 16px; }
    .cta-glow { width: 300px; height: 300px; }
    .footer { padding: 32px 16px 20px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 20px; padding-bottom: 20px; }
    .footer-brand p { font-size: 16px; }
    .footer-brand span { font-size: 13px; }
    .footer-grid h6 { font-size: 12px; margin-bottom: 8px; }
    .footer-grid a { font-size: 13px; padding: 3px 0; }
    .footer-bottom { font-size: 12px; }
    .theme-toggle-float { bottom: 20px; right: 20px; width: 44px; height: 44px; font-size: 18px; }
    .loader-ring { width: 70px; height: 70px; margin-bottom: 20px; }
    .loader-logo { width: 40px; height: 40px; }
    .loader-name { font-size: 20px; }
    .loader-progress { width: 160px; }
}

@media (max-width: 480px) {
    .hero { padding: 50px 12px 30px; }
    .hero-text h1 { font-size: 24px; margin-bottom: 10px; }
    .hero-text p { font-size: 14px; margin-bottom: 16px; line-height: 1.6; }
    .hero-badge { font-size: 10px; padding: 3px 12px; margin-bottom: 10px; }
    .hero-btns .btn-primary, .hero-btns .btn-glass { font-size: 14px; padding: 12px 16px; border-radius: 12px; }
    .hero-stats { gap: 10px; padding-top: 16px; }
    .hero-stats span { flex: 0 0 100%; font-size: 12px; }
    .hero-stats strong { font-size: 18px; display: inline-block; margin-right: 4px; }
    .hero-visual { gap: 6px; min-height: 60px; }
    .floating-card { padding: 6px 12px; font-size: 11px; border-radius: 8px; gap: 4px; }
    .floating-card i { font-size: 11px; }
    .hero-bg-glow { width: 300px; height: 300px; top: -20%; right: -30%; }
    .steps { padding: 32px 12px; }
    .sec-head { margin-bottom: 20px; }
    .sec-head h2 { font-size: 20px; }
    .sec-head p { font-size: 13px; }
    .timeline { padding-left: 18px; }
    .timeline::before { left: 7px; top: 18px; bottom: 18px; }
    .timeline-item { padding: 10px 0 10px 18px; }
    .timeline-dot { left: -15px; top: 18px; width: 8px; height: 8px; border-width: 2px; box-shadow: 0 0 0 2px var(--badge-bg); }
    .timeline-line { left: -10px; top: 26px; }
    .timeline-content { padding: 14px 16px; border-radius: 10px; }
    .timeline-content:hover { transform: none; }
    .timeline-number { font-size: 10px; }
    .timeline-icon { width: 32px; height: 32px; font-size: 13px; margin: 2px 0 6px; border-radius: 8px; }
    .timeline-content h3 { font-size: 15px; }
    .timeline-content p { font-size: 12px; line-height: 1.5; }
    .features { padding: 32px 12px; }
    .feat-grid { grid-template-columns: 1fr; gap: 10px; }
    .feat { padding: 18px 14px; border-radius: 12px; display: flex; flex-direction: row; align-items: center; text-align: left; gap: 12px; flex-wrap: wrap; }
    .feat-icon { width: 38px; height: 38px; font-size: 15px; margin: 0; flex-shrink: 0; }
    .feat-number { font-size: 22px; flex-shrink: 0; margin: 0; }
    .feat h3 { font-size: 15px; flex: 1; min-width: 70px; margin: 0; }
    .feat p { font-size: 12px; width: 100%; margin: 0; padding-left: 50px; }
    .feat-bg { display: none; }
    .feat:hover { transform: translateY(-2px); }
    .cta { padding: 32px 12px; min-height: 200px; }
    .cta h2 { font-size: 20px; }
    .cta p { font-size: 14px; margin-bottom: 16px; }
    .cta .btn-primary { font-size: 14px; padding: 12px 16px; border-radius: 12px; }
    .cta-glow { width: 200px; height: 200px; }
    .footer { padding: 20px 12px 16px; }
    .footer-grid { grid-template-columns: 1fr; gap: 14px; padding-bottom: 14px; text-align: center; }
    .footer-brand { display: flex; flex-direction: column; align-items: center; }
    .footer-brand p { font-size: 15px; }
    .footer-brand span { font-size: 12px; }
    .footer-grid h6 { font-size: 11px; margin-bottom: 6px; }
    .footer-grid a { font-size: 12px; justify-content: center; padding: 2px 0; }
    .footer-bottom { font-size: 11px; }
    .theme-toggle-float { bottom: 16px; right: 16px; width: 38px; height: 38px; font-size: 15px; }
    .loader-ring { width: 56px; height: 56px; margin-bottom: 16px; }
    .loader-ring-inner { inset: 5px; }
    .loader-logo-wrapper { gap: 10px; margin-bottom: 16px; }
    .loader-name { font-size: 17px; }
    .loader-badge { font-size: 8px; padding: 1px 8px; }
    .loader-progress { width: 140px; height: 2px; }
    .loader-text { font-size: 12px; }
    .scroll-anim { transition-duration: 0.5s; }
    .anim-fade-up { transform: translateY(30px); }
    .anim-fade-left { transform: translateX(-30px); }
    .anim-fade-right { transform: translateX(30px); }
}

@media (max-width: 380px) {
    .hero-text h1 { font-size: 20px; }
    .hero-text p { font-size: 13px; }
    .hero-btns .btn-primary, .hero-btns .btn-glass { font-size: 13px; padding: 10px 14px; }
    .floating-card { font-size: 10px; padding: 4px 10px; }
    .floating-card i { font-size: 10px; }
    .sec-head h2 { font-size: 18px; }
    .timeline-content h3 { font-size: 14px; }
    .timeline-content p { font-size: 11px; }
    .feat-number { font-size: 18px; }
    .feat h3 { font-size: 14px; }
    .feat p { font-size: 11px; padding-left: 40px; }
    .cta h2 { font-size: 18px; }
    .cta p { font-size: 13px; }
    .cta .btn-primary { font-size: 13px; padding: 10px 14px; }
}