/* ============================================================
   Index Modern Theme — 基于登录页风格统一首页视觉
   Design tokens 来源于 login.css
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --accent: #667eea;
    --accent2: #764ba2;
    --accent3: #f093fb;
    --accent-cyan: #4facfe;
    --accent-teal: #00f2fe;
    --bg-deep: #0f0f1e;
    --bg-mid: #141428;
    --bg-light: #1e1e3c;
    --glass: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-hover: rgba(255, 255, 255, 0.12);
    --text: rgba(255, 255, 255, 0.94);
    --text-secondary: rgba(255, 255, 255, 0.72);
    --text-muted: rgba(255, 255, 255, 0.52);
    --shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
    --glow: rgba(102, 126, 234, 0.25);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 20px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

/* ========== Base ========== */
html, body { height: 100%; width: 100%; }
html { scroll-behavior: smooth; }
* { box-sizing: border-box; }

body {
    margin: 0;
    overflow-x: hidden;
    color: var(--text);
    font-family: var(--font);
    background: linear-gradient(160deg, #0c0c24 0%, #15133c 20%, #1e1040 42%, #241248 60%, #15133c 78%, #0c0c24 100%);
    background-size: 320% 320%;
    animation: siteGradientShift 20s ease infinite;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@keyframes siteGradientShift {
    0% { background-position: 0% 40%; }
    50% { background-position: 100% 60%; }
    100% { background-position: 0% 40%; }
}

:root { --topbar-h: 74px; --topbar-offset: 14px; }
.section[id] { scroll-margin-top: calc(var(--topbar-h) + var(--topbar-offset)); }
.section-anchor { height: 1px; scroll-margin-top: calc(var(--topbar-h) + var(--topbar-offset)); }

a { color: inherit; text-decoration: none; transition: opacity 0.2s ease, transform 0.2s ease; }
a:hover { opacity: 0.92; }

.container {
    width: 90vw;
    max-width: none;
    margin: 0 auto;
    padding-left: clamp(16px, 4vw, 56px);
    padding-right: clamp(16px, 4vw, 56px);
}

/* ========== 背景图层 ========== */
.tech-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.tech-bg__pulse {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 35%, rgba(102, 126, 234, 0.28) 0%, transparent 48%),
        radial-gradient(circle at 80% 20%, rgba(240, 147, 251, 0.2) 0%, transparent 46%),
        radial-gradient(circle at 50% 70%, rgba(79, 172, 254, 0.22) 0%, transparent 50%);
    animation: bgPulse 10s ease-in-out infinite;
    pointer-events: none;
}

@keyframes bgPulse {
    0%, 100% { opacity: 0.55; transform: scale(1); }
    50% { opacity: 0.82; transform: scale(1.05); }
}

.tech-bg__clouds {
    position: absolute;
    inset: 0;
    opacity: 0.12;
    background-image:
        radial-gradient(ellipse 140px 48px at 12% 18%, rgba(102, 126, 234, 0.5), transparent),
        radial-gradient(ellipse 100px 36px at 16% 20%, rgba(102, 126, 234, 0.35), transparent),
        radial-gradient(ellipse 160px 52px at 78% 14%, rgba(240, 147, 251, 0.35), transparent),
        radial-gradient(ellipse 110px 38px at 82% 16%, rgba(240, 147, 251, 0.25), transparent),
        radial-gradient(ellipse 120px 42px at 45% 8%, rgba(79, 172, 254, 0.22), transparent);
    animation: cloudDrift 36s ease-in-out infinite;
    pointer-events: none;
}

@keyframes cloudDrift {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(24px); }
}

.tech-bg__ink {
    position: absolute;
    inset: 0;
    opacity: 0.06;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='.3'/%3E%3C/svg%3E");
    mix-blend-mode: overlay;
    pointer-events: none;
}

.tech-bg__mountains {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 42vh;
    pointer-events: none;
    opacity: 0.25;
}
.tech-bg__mountains::before,
.tech-bg__mountains::after {
    content: "";
    position: absolute;
    bottom: 0;
    width: 62%;
    height: 100%;
    background: linear-gradient(180deg, rgba(12, 12, 36, 0.1), rgba(12, 12, 36, 0.65));
    clip-path: polygon(0% 100%, 14% 58%, 28% 74%, 44% 42%, 58% 62%, 72% 34%, 88% 52%, 100% 38%, 100% 100%);
}
.tech-bg__mountains::before { left: -4%; opacity: 0.75; }
.tech-bg__mountains::after { right: -4%; transform: scaleX(-1); opacity: 0.55; }

.tech-bg__stars {
    position: absolute;
    inset: 0;
    opacity: 0.55;
    pointer-events: none;
}

.guo-star, .site-star {
    position: absolute;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(102, 126, 234, 0.8), 0 0 14px rgba(102, 126, 234, 0.45);
    animation: starTwinkle linear infinite;
}

@keyframes starTwinkle {
    0% { opacity: 0.12; transform: scale(0.5); }
    50% { opacity: 0.9; transform: scale(1.8); }
    100% { opacity: 0.12; transform: scale(0.5); }
}

.tech-bg__glow--a {
    opacity: 0.35;
    filter: blur(12px);
    background: radial-gradient(circle at 30% 30%, rgba(102, 126, 234, 0.4), transparent 55%);
}
.tech-bg__glow--b {
    opacity: 0.32;
    filter: blur(12px);
    background: radial-gradient(circle at 30% 30%, rgba(240, 147, 251, 0.3), transparent 55%);
}

.tech-bg__noise { opacity: 0.04; }

/* ========== Topbar ========== */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 10;
    background: rgba(15, 15, 30, 0.55);
    border-bottom: 1px solid rgba(102, 126, 234, 0.25);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.topbar--scrolled {
    background: rgba(12, 12, 30, 0.9);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.38);
    border-bottom-color: rgba(102, 126, 234, 0.4);
}

.topbar__inner {
    min-height: 64px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px 16px;
    padding-top: 8px;
    padding-bottom: 8px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 0 1 auto;
    max-width: 100%;
}

.brand__icon {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.brand__seal {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 14px rgba(102, 126, 234, 0.35);
    animation: sealPulse 3s ease-in-out infinite;
}

@keyframes sealPulse {
    0%, 100% { box-shadow: 0 0 12px rgba(102, 126, 234, 0.3); }
    50% { box-shadow: 0 0 22px rgba(102, 126, 234, 0.5); }
}

.brand__name {
    font-weight: 700;
    font-size: clamp(18px, 2.2vw, 22px);
    letter-spacing: 0.5px;
    color: #fff;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: min(52vw, 420px);
}

.brand__grid, .brand__dot { display: none; }

.topbar__nav {
    display: flex;
    gap: 14px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 14px;
    white-space: nowrap;
}

.topbar__nav a {
    padding: 7px 12px;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.topbar__nav a:hover {
    background: rgba(102, 126, 234, 0.2);
    color: #fff;
}

.topbar__nav a.is-active {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.45), rgba(118, 75, 162, 0.35));
    color: #fff;
    box-shadow: 0 0 14px rgba(102, 126, 234, 0.25);
}

.topbar__cta {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
    flex: 0 1 auto;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: 8px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    user-select: none;
    transition: all 0.25s ease;
    letter-spacing: 0.3px;
}

.btn--block { width: 100%; }

.btn--primary {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.35);
}
.btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 28px rgba(102, 126, 234, 0.45);
}
.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.3);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.btn--ghost:hover {
    transform: translateY(-1px);
    background: rgba(102, 126, 234, 0.2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25), 0 0 18px rgba(102, 126, 234, 0.2);
}

.topbar__ctaBtn {
    padding: 9px 16px;
    font-size: 13px;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}
.topbar__ctaBtn:hover {
    box-shadow: 0 6px 22px rgba(102, 126, 234, 0.45);
}

/* ========== 布局 ========== */
#mainbody {
    position: relative;
    z-index: 1;
    padding-top: var(--topbar-h);
}

/* ========== Hero ========== */
.hero {
    min-height: calc(100vh - var(--topbar-h));
    padding: clamp(48px, 7vw, 96px) 0 clamp(24px, 4vw, 48px);
    position: relative;
    overflow: hidden;
}

.hero .container { position: relative; z-index: 1; }

.hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(20px, 3vw, 56px);
    align-items: center;
}

/* Hero decorative characters */
.hero::before,
.hero::after {
    position: absolute;
    font-size: clamp(48px, 8vw, 88px);
    font-weight: 800;
    line-height: 1;
    color: rgba(102, 126, 234, 0.12);
    pointer-events: none;
    z-index: 0;
}

.hero::before {
    content: "云";
    top: 8%;
    right: 4%;
    animation: guoFloat 6s ease-in-out infinite;
}

.hero::after {
    content: "快";
    font-size: clamp(36px, 6vw, 64px);
    bottom: 14%;
    left: 2%;
    opacity: 0.85;
    animation: guoFloat 5s ease-in-out infinite 1s;
}

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

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}

.badge--guo {
    color: #fff;
    background: rgba(102, 126, 234, 0.2);
    border: 1px solid rgba(102, 126, 234, 0.35);
    box-shadow: 0 0 16px rgba(102, 126, 234, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    letter-spacing: 0.5px;
}

.badge--guo::before { content: "✦ "; color: var(--accent3); }
.badge--guo::after { content: " ✦"; color: var(--accent3); }

.hero__title {
    margin: 16px 0 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    font-size: clamp(28px, 4.6vw, 64px);
    color: #fff;
}

.hero__title--guo {
    font-size: clamp(36px, 5.2vw, 72px);
    line-height: 1.15;
    text-shadow: 0 0 40px rgba(102, 126, 234, 0.3);
}

.hero__titleAccent {
    background: linear-gradient(135deg, var(--accent3), var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__bullets {
    margin: 14px 0 12px;
    padding-left: 0;
    list-style: none;
    color: rgba(255, 255, 255, 0.82);
    line-height: 1.9;
    font-size: 15px;
}

.hero__bullets li {
    position: relative;
    padding-left: 1.5em;
}

.hero__bullets li::before {
    content: "✦";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 0.55em;
    top: 0.4em;
}

.hero__desc {
    margin: 0;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    max-width: 56ch;
}

.hero__meta {
    margin-top: 22px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.stat {
    border-radius: var(--radius-sm);
    padding: 14px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.stat__num {
    font-weight: 800;
    letter-spacing: 0.2px;
    font-size: 20px;
    color: var(--accent3);
}

.stat__unit {
    margin-left: 4px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.stat__label {
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 12px;
}

/* ========== Hero Visual / Card3D ========== */
.hero__visual {
    display: flex;
    justify-content: center;
}

.card3d {
    position: relative;
    width: min(560px, 100%);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(102, 126, 234, 0.2);
    box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    overflow: hidden;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transform: perspective(900px) rotateY(-8deg) rotateX(5deg);
    transition: transform 0.35s ease;
    animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% { transform: perspective(900px) rotateY(-8deg) rotateX(5deg) translateY(0); }
    50% { transform: perspective(900px) rotateY(-8deg) rotateX(5deg) translateY(-10px); }
}

.card3d__glow {
    position: absolute;
    inset: -40px;
    background:
        radial-gradient(550px 260px at 20% 10%, rgba(102, 126, 234, 0.2), transparent 60%),
        radial-gradient(550px 260px at 80% 0%, rgba(240, 147, 251, 0.18), transparent 60%);
    pointer-events: none;
}

.card3d__top {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.15);
}

.card3d__title {
    font-weight: 700;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.2px;
}

.pulse {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--accent3);
    box-shadow: 0 0 0 8px rgba(240, 147, 251, 0.12), 0 0 24px rgba(240, 147, 251, 0.35);
    animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
    0%, 100% { box-shadow: 0 0 0 8px rgba(240, 147, 251, 0.12), 0 0 24px rgba(240, 147, 251, 0.3); }
    50% { box-shadow: 0 0 0 14px rgba(240, 147, 251, 0.06), 0 0 36px rgba(240, 147, 251, 0.45); }
}

.card3d__body { padding: 16px; }

.sparkline {
    height: 118px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background:
        radial-gradient(800px 200px at 15% 30%, rgba(102, 126, 234, 0.18), transparent 55%),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
    position: relative;
    overflow: hidden;
}

.sparkline::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 100% 28px;
    opacity: 0.45;
}

.sparkline::after {
    content: "";
    position: absolute;
    inset: 18px 14px;
    border-radius: 14px;
    background: linear-gradient(90deg, rgba(102, 126, 234, 0), rgba(102, 126, 234, 0.4), rgba(240, 147, 251, 0.25), rgba(102, 126, 234, 0));
    transform: skewX(-16deg);
    filter: blur(10px);
    opacity: 0.4;
}

.mini-cards {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.mini-card {
    border-radius: var(--radius-sm);
    padding: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(102, 126, 234, 0.15);
}

.mini-card__k {
    color: var(--text-muted);
    font-size: 12px;
}

.mini-card__v {
    margin-top: 6px;
    font-weight: 800;
    letter-spacing: 0.2px;
    color: var(--accent3);
}

/* ========== Sections ========== */
.section {
    min-height: calc(100vh - var(--topbar-h));
    padding: clamp(40px, 6vw, 88px) 0;
}

.section--alt {
    background: rgba(102, 126, 234, 0.04);
    border-top: 1px solid rgba(102, 126, 234, 0.12);
    border-bottom: 1px solid rgba(102, 126, 234, 0.12);
}

.section__head {
    display: grid;
    gap: 10px;
    margin-bottom: clamp(18px, 2.5vw, 28px);
    position: relative;
}

.section__title {
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.01em;
    font-size: clamp(22px, 2.6vw, 36px);
    color: #fff;
    display: inline-block;
    padding-bottom: 4px;
}

.section__title::before {
    content: "「";
    margin-right: 0.1em;
    color: var(--accent);
}
.section__title::after {
    content: "」";
    margin-left: 0.1em;
    color: var(--accent);
    position: static;
    width: auto; height: auto;
    background: none;
    box-shadow: none;
    border-radius: 0;
}

.section__head::after {
    content: "";
    display: block;
    width: 72px;
    height: 3px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent3));
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

.section__subtitle {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Grids ========== */
.grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(12px, 1.5vw, 18px); }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(12px, 1.5vw, 18px); }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(12px, 1.5vw, 18px); }

/* ========== Cards（统一玻璃卡片） ========== */
.feature, .product, .service, .plan, .about-card,
.form, .contact__item, .contact__wechat {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.18);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature, .product, .about-card { position: relative; }

.feature::before,
.product::before,
.about-card::before {
    content: "";
    position: absolute;
    top: 10px; right: 10px;
    width: 24px; height: 24px;
    border: 1px solid rgba(102, 126, 234, 0.25);
    border-radius: 50%;
    opacity: 0.3;
    pointer-events: none;
}

.feature:hover, .product:hover, .service:hover,
.plan:hover, .about-card:hover {
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.4);
    box-shadow: var(--shadow-lg), 0 0 24px rgba(102, 126, 234, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ========== About ========== */
.about__lead {
    max-width: 92ch;
    color: var(--text-secondary);
    line-height: 1.8;
}
.about__lead p { margin: 0 0 10px; }
.about__cards { margin-top: 14px; }

.about-card__title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent3);
}

.about-card__desc {
    margin: 10px 0 0;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ========== Feature ========== */
.feature__icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    box-shadow: 0 0 14px rgba(102, 126, 234, 0.3);
    font-size: 16px;
}

.feature__title, .product__title, .service__title {
    margin: 12px 0 8px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.feature__desc, .service__desc {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Product ========== */
.product__tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.55), rgba(118, 75, 162, 0.45));
    border: 1px solid rgba(102, 126, 234, 0.3);
    color: #fff;
    font-size: 12px;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.2);
}

.list {
    margin: 12px 0 14px;
    padding-left: 18px;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.7;
}
.list--compact { margin: 12px 0 16px; }

/* ========== Service ========== */
.service__bullets {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service__bullets span {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.78);
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.2);
}

/* ========== Plans ========== */
.plan__name {
    font-weight: 700;
    color: #fff;
}

.plan__price {
    margin-top: 10px;
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.plan__num {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent3), var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.plan__unit {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
}

.plan--hot {
    border-color: rgba(240, 147, 251, 0.35);
    background: rgba(102, 126, 234, 0.08);
    position: relative;
}

.plan--hot::before {
    content: "推荐";
    position: absolute;
    top: -10px;
    right: 16px;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent3));
    border: 1px solid rgba(255, 255, 255, 0.25);
    animation: badgeShine 2.5s ease-in-out infinite;
}

@keyframes badgeShine {
    0%, 100% { box-shadow: 0 0 12px rgba(102, 126, 234, 0.2); }
    50% { box-shadow: 0 0 20px rgba(240, 147, 251, 0.35); }
}

/* ========== CTA + Form ========== */
.cta {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(12px, 1.5vw, 18px);
    align-items: start;
}

.cta__title {
    margin: 0;
    font-size: clamp(22px, 2.6vw, 36px);
    font-weight: 800;
    color: #fff;
}

.cta__desc {
    margin: 10px 0 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact {
    margin-top: 14px;
    display: grid;
    gap: 10px;
}

.contact__item {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
}

.contact__k, .contact__wechatTitle, .field__label {
    color: rgba(240, 147, 251, 0.78);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.contact__v { color: rgba(255, 255, 255, 0.88); }

.contact__wechat {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    display: grid;
    gap: 10px;
    justify-items: center;
}

.contact__wechatTitle {
    text-align: center;
    font-weight: 700;
}

.contact__wechatImg {
    width: min(240px, 100%);
    height: auto;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.18);
    padding: 10px;
    justify-self: center;
}

.form {
    border-radius: var(--radius-lg);
    padding: 20px;
}

.form__title {
    font-weight: 700;
    color: var(--accent3);
    margin-bottom: 14px;
    font-size: 16px;
}

.field {
    display: grid;
    grid-template-columns: 56px 1fr;
    align-items: center;
    column-gap: 12px;
    row-gap: 8px;
    margin-bottom: 12px;
}

.field__input {
    width: 100%;
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    border: 1px solid rgba(102, 126, 234, 0.25);
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
    outline: none;
    font-family: var(--font);
    font-size: 14px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.25s ease;
}

.field__input::placeholder {
    color: rgba(255, 255, 255, 0.38);
}

.field__input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.field__input--textarea {
    min-height: 160px;
    resize: vertical;
    align-self: start;
}

.form__tip {
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.6;
}

/* ========== Footer ========== */
.footer {
    position: relative;
    z-index: 2;
    background: rgba(12, 12, 30, 0.6);
    border-top: 1px solid rgba(102, 126, 234, 0.18);
    padding: 18px 0;
    text-align: center;
    color: var(--text-muted);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.footer p {
    margin: 0;
    font-size: 13px;
}

.footer a {
    color: var(--accent3);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ========== Responsive ========== */
@media (max-width: 1199px) {
    .grid4 { gap: clamp(12px, 2vw, 16px); }
}

@media (max-width: 1023px) {
    .hero__grid { grid-template-columns: 1fr; }
    .hero__visual { order: -1; }
    .card3d { transform: none; margin-inline: auto; }
    .grid4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .topbar__nav {
        display: flex;
        gap: 10px;
        font-size: 13px;
        flex: 1 1 100%;
        overflow-x: auto;
        padding-bottom: 2px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .topbar__nav::-webkit-scrollbar { display: none; }
    .topbar__nav a { padding: 6px 10px; flex: 0 0 auto; }
}

@media (max-width: 767px) {
    .grid2, .grid3, .grid4 { grid-template-columns: 1fr; }
    .cta { grid-template-columns: 1fr; }
    .hero__meta { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .contact__item { grid-template-columns: 48px 1fr; gap: 10px; }
    .feature, .product, .about-card { transform: none; }
}

@media (max-width: 479px) {
    .hero__meta { grid-template-columns: 1fr; }
    .topbar__inner { min-height: 60px; }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(102, 126, 234, 0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(102, 126, 234, 0.5); }

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto !important; }
    body { animation: none !important; }
    .card3d, .guo-star, .site-star, .tech-bg__pulse, .tech-bg__glow--a, .tech-bg__glow--b,
    .brand__seal, .plan--hot::before, .badge--guo { animation: none !important; }
    .feature:hover, .product:hover, .service:hover, .plan:hover, .about-card:hover {
        transform: none !important;
    }
}