* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: #0f172a;
    background: #ffffff;
    font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid #eef2f7;
}
.header-inner {
    max-width: 1180px;
    height: 72px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
}
.brand { display:flex; align-items:center; gap:10px; font-size:26px; font-weight:800; }
.brand-logo { width:40px; height:40px; object-fit:contain; }
.nav { margin-left:60px; display:flex; gap:28px; color:#475569; font-size:14px; font-weight:600; }
.nav a:hover { color:#2563eb; }
.header-actions { margin-left:auto; display:flex; align-items:center; gap:18px; }
.login-link { color:#475569; font-size:14px; font-weight:700; }
.primary-small { padding:10px 16px; border-radius:10px; background:#2563eb; color:#fff; font-size:14px; font-weight:700; }

.hero {
    overflow:hidden;
    background: radial-gradient(circle at 75% 30%,#dbeafe 0,transparent 34%), linear-gradient(180deg,#f8fbff 0%,#fff 100%);
}
.hero-inner {
    max-width:1180px;
    min-height:660px;
    margin:0 auto;
    padding:95px 24px 90px;
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:70px;
    align-items:center;
}
.eyebrow,
.section-heading > span,
.download-kicker,
.feature-page-kicker {
    color:#2563eb;
    font-size:18px;
    font-weight:850;
    letter-spacing:.04em;
}
.hero h1 { max-width:650px; margin:18px 0 22px; font-size:clamp(44px,6vw,70px); line-height:1.08; letter-spacing:-.04em; }
.hero h1 span { color:#2563eb; }
.hero-description { max-width:600px; margin:0; color:#64748b; font-size:18px; line-height:1.8; }
.hero-actions { margin-top:32px; display:flex; gap:12px; flex-wrap:wrap; }
.primary-button,.secondary-button { min-height:50px; padding:0 22px; border-radius:12px; display:inline-flex; align-items:center; justify-content:center; font-weight:800; }
.primary-button { background:#2563eb; color:#fff; box-shadow:0 12px 30px rgba(37,99,235,.22); }
.secondary-button { background:#fff; border:1px solid #dbe3ef; color:#0f172a; }
.hero-note { margin-top:18px; color:#94a3b8; font-size:13px; }

.preview-window { overflow:hidden; background:#fff; border:1px solid #dbe5f1; border-radius:22px; box-shadow:0 30px 80px rgba(15,23,42,.13); transform:none; }
.preview-topbar { height:46px; padding:0 15px; display:flex; align-items:center; gap:7px; border-bottom:1px solid #edf2f7; }
.preview-topbar span { width:10px; height:10px; border-radius:50%; background:#cbd5e1; }
.preview-content { min-height:390px; display:grid; grid-template-columns:145px 1fr; }
.preview-sidebar { padding:24px 14px; background:#f8fafc; border-right:1px solid #edf2f7; }
.preview-logo { margin-bottom:28px; padding:0 8px; font-size:14px; font-weight:800; }
.preview-nav { margin-bottom:8px; padding:10px; color:#64748b; border-radius:9px; font-size:12px; font-weight:700; }
.preview-nav.active { background:#eaf2ff; color:#2563eb; }
.preview-main { padding:35px 30px; }
.preview-kicker { color:#2563eb; font-size:13px; font-weight:800; }
.preview-main h3 { margin:10px 0 24px; font-size:24px; }
.preview-card { margin-bottom:10px; padding:14px; background:#f8fafc; border:1px solid #edf2f7; border-radius:11px; color:#475569; font-size:12px; }
.preview-input { margin-top:35px; padding:14px; display:flex; justify-content:space-between; background:#fff; border:1px solid #dbe3ef; border-radius:12px; color:#94a3b8; font-size:12px; }
.preview-input span { width:25px; height:25px; display:grid; place-items:center; background:#2563eb; color:#fff; border-radius:8px; }

.section { max-width:1180px; margin:0 auto; padding:110px 24px; }
.section-heading { max-width:720px; margin-bottom:50px; }
.section-heading h2, .feature-explain-grid h2 { margin:12px 0 14px; font-size:clamp(34px,4vw,50px); line-height:1.16; letter-spacing:-.035em; }
.section-heading p { color:#64748b; line-height:1.75; font-size:17px; }
.wide-heading { max-width:860px; }

.feature-grid { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:18px; }
.feature-card { min-height:270px; padding:26px; background:#fff; border:1px solid #e7edf5; border-radius:18px; box-shadow:0 8px 30px rgba(15,23,42,.04); transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease; }
.feature-card:hover { transform:translateY(-5px); border-color:#cbdcfb; box-shadow:0 16px 34px rgba(30,60,100,.10); }
.feature-icon { width:48px; height:48px; display:grid; place-items:center; margin-bottom:24px; background:#eff6ff; border-radius:13px; font-size:23px; }
.feature-card h3 { margin:0 0 12px; font-size:21px; }
.feature-card p { margin:0; color:#64748b; font-size:14px; line-height:1.75; }
.feature-more { display:inline-block; margin-top:18px; font-size:14px; font-weight:750; color:#2563eb; }

.screenshot-section { max-width:none; background:#f8fafc; }
.screenshot-section > * { max-width:1180px; margin-left:auto; margin-right:auto; }
.screenshot-grid { display:grid; grid-template-columns:repeat(4,255px); justify-content:center; gap:22px; align-items:stretch; }
.screenshot-card { width:255px; height:100%; padding:10px; background:#fff; border:1px solid #e5eaf1; border-radius:18px; display:flex; flex-direction:column; }
.phone-shot { width:100%; overflow:hidden; border-radius:14px; background:#f8fafc; border:1px solid #e5eaf1; flex-shrink:0; }
.phone-shot img { display:block; width:100%; height:auto; }
.screenshot-card h3 { margin:14px 3px 5px; font-size:17px; }
.screenshot-card p { margin:0 3px 4px; color:#64748b; font-size:12px; line-height:1.55; }

.download-section { padding:110px 24px; background:#0f172a; color:#fff; }
.download-inner { max-width:1180px; margin:0 auto; display:grid; grid-template-columns:.8fr 1.2fr; gap:70px; align-items:center; }
.download-section h2 { margin:12px 0; font-size:42px; }
.download-section p { color:#94a3b8; line-height:1.8; }
.download-options { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.download-card { min-height:100px; padding:18px; display:flex; align-items:center; gap:13px; border-radius:16px; }
.active-download { background:#2563eb; }
.disabled-download { background:#1e293b; color:#94a3b8; }
.download-icon { font-size:25px; }
.download-card small { display:block; margin-bottom:4px; font-size:11px; opacity:.8; }
.download-card strong { font-size:15px; }

.final-cta { padding:110px 24px; text-align:center; }
.final-cta > div { max-width:760px; margin:0 auto; }
.final-cta h2 { margin:0 0 14px; font-size:42px; letter-spacing:-.03em; }
.final-cta p { margin-bottom:28px; color:#64748b; font-size:17px; }

/* Feature detail pages */
.feature-page { background:#fff; }
.feature-hero { background:linear-gradient(180deg,#f5f9ff 0%,#fff 100%); border-bottom:1px solid #eef2f7; }
.feature-hero-inner { max-width:1180px; margin:0 auto; padding:105px 24px 95px; }
.feature-copy { max-width:840px; }
.feature-hero-icon { width:64px; height:64px; margin:24px 0 20px; display:grid; place-items:center; border-radius:18px; background:#eaf2ff; font-size:31px; }
.feature-copy h1 { margin:0 0 20px; font-size:clamp(48px,6vw,76px); letter-spacing:-.045em; line-height:1.04; }
.feature-copy > p { max-width:760px; margin:0; color:#64748b; font-size:20px; line-height:1.8; }
.feature-media-section { padding-top:100px; }
.product-media-grid { display:grid; grid-template-columns:minmax(0,1.75fr) minmax(280px,.75fr); gap:28px; align-items:start; }
.product-shot { overflow:hidden; border:1px solid #dfe7f1; background:#fff; box-shadow:0 22px 55px rgba(15,23,42,.08); }
.product-shot-desktop { border-radius:22px; }
.product-shot-mobile { max-width:340px; justify-self:center; border-radius:32px; }
.shot-topline { min-height:46px; padding:0 16px; display:flex; align-items:center; gap:7px; background:#f8fafc; border-bottom:1px solid #e9eef5; color:#64748b; font-size:13px; }
.shot-topline span { width:10px; height:10px; border-radius:50%; background:#cbd5e1; }
.shot-topline strong { margin-left:auto; font-weight:750; }
.mobile-topline strong { margin:0 auto; }
.shot-placeholder { min-height:430px; padding:32px; display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; background:linear-gradient(145deg,#f8fbff,#eef4ff); color:#64748b; }
.shot-placeholder strong { color:#0f172a; font-size:20px; }
.shot-placeholder span { margin-top:10px; font-size:13px; }
.mobile-placeholder { min-height:610px; }
.mobile-image-wrap { background:#eef3f8; }
.mobile-image-wrap img { display:block; width:100%; height:auto; }
.feature-explain-section { padding-top:80px; padding-bottom:120px; }
.feature-explain-grid { display:grid; grid-template-columns:.9fr 1.1fr; gap:90px; align-items:start; }
.feature-explain-grid > div > p { color:#64748b; font-size:17px; line-height:1.85; }
.feature-benefit-list { display:grid; gap:14px; }
.benefit-item { padding:24px; border:1px solid #e5eaf1; border-radius:16px; background:#fff; }
.benefit-item strong { display:block; margin-bottom:7px; font-size:18px; }
.benefit-item span { color:#64748b; font-size:14px; line-height:1.7; }
.feature-bottom-cta { padding:100px 24px; background:#0f172a; color:#fff; text-align:center; }
.feature-bottom-cta > div { max-width:760px; margin:0 auto; }
.feature-bottom-cta h2 { margin:14px 0; font-size:clamp(34px,4vw,48px); }
.feature-bottom-cta p { margin:0 0 28px; color:#94a3b8; font-size:17px; }

.footer { padding:40px 24px 28px; background:#f8fafc; border-top:1px solid #e5eaf1; font-size:14px; }
.footer-inner { max-width:1180px; margin:0 auto; display:flex; align-items:center; }
.footer-brand { display:flex; align-items:center; gap:10px; }
.footer-brand img { width:34px; height:34px; }
.footer-brand strong,.footer-brand span { display:block; }
.footer-brand span { margin-top:2px; color:#94a3b8; font-size:11px; }
.footer-links { margin-left:auto; display:flex; flex-wrap:wrap; gap:22px; color:#64748b; font-size:13px; }
.footer-bottom { max-width:1180px; margin:30px auto 0; padding-top:20px; border-top:1px solid #e5eaf1; color:#94a3b8; font-size:12px; }

@media (max-width:1100px) {
    .feature-grid { grid-template-columns:repeat(3,minmax(0,1fr)); }
}
@media (max-width:900px) {
    .nav { display:none; }
    .hero-inner { grid-template-columns:1fr; padding-top:70px; }
    .hero-copy { text-align:center; }
    .hero-description { margin-left:auto; margin-right:auto; }
    .hero-actions { justify-content:center; }
    .feature-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
    .screenshot-grid { grid-template-columns:repeat(2,255px); }
    .download-inner { grid-template-columns:1fr; }
    .product-media-grid { grid-template-columns:1fr; }
    .product-shot-mobile { width:min(340px,100%); }
    .feature-explain-grid { grid-template-columns:1fr; gap:45px; }
}
@media (max-width:600px) {
    .header-inner { padding:0 16px; }
    .brand { font-size:20px; }
    .brand-logo { width:34px; height:34px; }
    .login-link { display:none; }
    .eyebrow,.section-heading > span,.download-kicker,.feature-page-kicker { font-size:16px; }
    .hero-inner { min-height:auto; padding:60px 18px 70px; }
    .hero h1 { font-size:42px; }
    .hero-description { font-size:16px; }
    .preview-content { grid-template-columns:100px 1fr; }
    .preview-main { padding:28px 18px; }
    .section { padding:80px 18px; }
    .feature-grid { grid-template-columns:1fr; }
    .screenshot-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; }
    .screenshot-card { width:100%; }
    .download-section { padding:80px 18px; }
    .download-options { grid-template-columns:1fr; }
    .final-cta { padding:80px 18px; }
    .feature-hero-inner { padding:70px 18px 65px; }
    .feature-copy h1 { font-size:46px; }
    .feature-copy > p { font-size:17px; }
    .shot-placeholder { min-height:260px; }
    .mobile-placeholder { min-height:480px; }
    .footer-inner { align-items:flex-start; gap:25px; flex-direction:column; }
    .footer-links { margin-left:0; flex-wrap:wrap; }
}


/* ===== 蓝色栏目主标题：与黑色主标题同级 ===== */

.section-heading > span,
.feature-kicker,
.feature-eyebrow {
    display: block;
    color: #2563eb;

    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    line-height: 1.16;
    letter-spacing: -0.035em;

    text-transform: none;
    margin-bottom: 14px;
}

@media (max-width: 600px) {
    .section-heading > span,
    .feature-kicker,
    .feature-eyebrow {
        font-size: 32px;
    }
}

/* ===== 首页 Hero 顶部蓝色主标题 ===== */
.eyebrow {
    display: block;
    font-size: clamp(44px, 6vw, 70px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
    text-transform: none;
    margin-bottom: 18px;
}


/* ===== 功能详情页顶部蓝色主标题 ===== */
.feature-page-kicker {
    display: block;
    font-size: clamp(48px, 6vw, 76px);
    font-weight: 800;
    line-height: 1.04;
    letter-spacing: -0.045em;
    text-transform: none;
    margin-bottom: 20px;
}


/* 手机端 */
@media (max-width: 600px) {
    .eyebrow {
        font-size: 42px;
    }

    .feature-page-kicker {
        font-size: 46px;
    }
}

/* 官网功能详情页：显示实际网页版截图 */
.desktop-image-wrap {
    background: #eef3f8;
}

.desktop-image-wrap img {
    display: block;
    width: 100%;
    height: auto;
}