:root {
    --ink: #1f2521;
    --muted: #6d756d;
    --line: #e4e1d8;
    --paper: #fbfaf6;
    --soft: #f1eee6;
    --wood: #8d5d34;
    --leaf: #45624b;
    --gold: #bd8a45;
    --white: #ffffff;
    --shadow: 0 22px 70px rgba(38, 32, 22, .12);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.topbar {
    background: var(--leaf);
    color: var(--white);
    font-size: 13px;
}

.topbar-inner {
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(251, 250, 246, .94);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(69, 98, 75, .12);
}

.nav-shell {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 230px;
}

.brand-mark {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    background: var(--ink);
    color: var(--gold);
    font-weight: 800;
    letter-spacing: 0;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong { font-size: 18px; line-height: 1.2; }
.brand small { color: var(--muted); font-size: 12px; }

.site-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav a {
    padding: 9px 10px;
    color: #41483f;
    font-size: 14px;
    border-radius: 6px;
}

.site-nav a:hover,
.site-nav a.is-active {
    background: var(--soft);
    color: var(--leaf);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--ink);
    font-size: 22px;
}

.page-hero {
    padding: 64px 0 52px;
    background:
        linear-gradient(110deg, rgba(251, 250, 246, .96) 0%, rgba(251, 250, 246, .83) 55%, rgba(241, 238, 230, .9) 100%);
}

.page-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
    align-items: center;
    gap: 44px;
}

.eyebrow,
.section-head span {
    color: var(--wood);
    font-weight: 700;
    font-size: 14px;
}

h1,
h2,
h3,
p { margin-top: 0; }

h1 {
    margin-bottom: 18px;
    font-size: clamp(34px, 5vw, 62px);
    line-height: 1.08;
    letter-spacing: 0;
}

.page-hero p {
    max-width: 690px;
    color: #495049;
    font-size: 18px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border: 1px solid var(--leaf);
    border-radius: 6px;
    font-weight: 700;
}

.btn.primary { background: var(--leaf); color: var(--white); }
.btn.ghost { color: var(--leaf); background: transparent; }
.btn.light { border-color: var(--white); color: var(--leaf); background: var(--white); }

.stats-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 34px;
    max-width: 520px;
}

.stats-strip strong {
    padding: 16px;
    background: var(--white);
    box-shadow: 0 10px 30px rgba(35, 30, 20, .08);
    border-left: 3px solid var(--gold);
    font-size: 25px;
}

.stats-strip span {
    display: block;
    color: var(--muted);
    font-size: 13px;
    font-weight: 500;
}

.hero-photo {
    margin: 0;
    aspect-ratio: 4 / 4.7;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--soft);
}

.hero-photo img,
.image-card img,
.mini-case img,
.case-card img,
.cert-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.section { padding: 72px 0; }
.section.muted { background: var(--soft); }

.section-head {
    max-width: 760px;
    margin-bottom: 30px;
}

.section-head h2 {
    margin: 6px 0 10px;
    font-size: clamp(26px, 3vw, 40px);
    line-height: 1.18;
}

.section-head p { color: var(--muted); }

.advantage-grid,
.feature-row,
.warranty-grid,
.commitment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card,
.warranty-grid article,
.commitment-grid article,
.price-card,
.callout,
.pain-card,
.news-list article {
    background: var(--white);
    border: 1px solid rgba(69, 98, 75, .12);
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 12px 34px rgba(38, 32, 22, .06);
}

.feature-card span {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    margin-bottom: 18px;
    background: var(--leaf);
    color: var(--white);
    border-radius: 50%;
    font-weight: 800;
}

.feature-card h3,
.warranty-grid h3,
.commitment-grid h3,
.price-card h3 { margin-bottom: 8px; }

.feature-card p,
.warranty-grid p,
.commitment-grid p,
.price-card p,
.price-card small { color: var(--muted); }

.feature-card.compact { min-height: 180px; }

.space-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.image-card {
    min-height: 330px;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background: #1d211d;
}

.image-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,.72) 100%);
}

.image-card div {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 14px;
    z-index: 1;
    color: var(--white);
}

.image-card h3 { margin-bottom: 4px; }
.image-card p { margin-bottom: 0; color: rgba(255,255,255,.82); font-size: 14px; }
.static-card { pointer-events: none; }

.split-grid,
.two-col,
.contact-grid {
    display: grid;
    grid-template-columns: 1.4fr .8fr;
    gap: 34px;
    align-items: start;
}

.mini-case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.mini-case {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--line);
}

.mini-case img { aspect-ratio: 4 / 3; }
.mini-case strong,
.mini-case span {
    display: block;
    padding: 0 14px;
}
.mini-case strong { padding-top: 14px; }
.mini-case span { padding-bottom: 14px; color: var(--muted); font-size: 13px; }

.notice-panel {
    position: sticky;
    top: 110px;
    background: var(--leaf);
    color: var(--white);
    border-radius: 8px;
    padding: 26px;
}

.notice-panel a {
    display: block;
    padding: 15px 0;
    border-top: 1px solid rgba(255,255,255,.18);
}

.notice-panel time {
    display: block;
    color: #d8c095;
    font-size: 13px;
}

.table-like {
    display: grid;
    gap: 14px;
}

.table-like article {
    display: grid;
    grid-template-columns: 260px 1fr 1fr 1fr;
    gap: 18px;
    align-items: start;
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.table-like h3,
.table-like p { margin-bottom: 0; }
.table-like p { color: var(--muted); }

.timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.timeline article {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 16px;
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.timeline span {
    grid-row: span 2;
    color: var(--gold);
    font-size: 28px;
    font-weight: 800;
}

.timeline h3,
.timeline p { margin-bottom: 0; }
.timeline p { color: var(--muted); }

.callout ul,
.pain-card ul,
.news-list ul { padding-left: 20px; margin-bottom: 0; }

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 24px;
}

.price-card strong {
    display: block;
    margin: 10px 0 12px;
    color: var(--wood);
    font-size: 28px;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.process-grid article {
    padding: 26px;
    border-radius: 8px;
    background: var(--white);
    border: 1px solid var(--line);
}

.process-grid span {
    color: var(--gold);
    font-size: 26px;
    font-weight: 800;
}

.response-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.response-band div {
    padding: 30px;
    background: var(--leaf);
    color: var(--white);
    border-radius: 8px;
    text-align: center;
}

.response-band strong {
    display: block;
    font-size: 34px;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 22px;
}

.filter-bar button {
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--ink);
    border-radius: 6px;
    cursor: pointer;
}

.filter-bar button.is-active {
    background: var(--leaf);
    color: var(--white);
    border-color: var(--leaf);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.case-card {
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.case-card img { aspect-ratio: 4 / 3; }
.case-card div { padding: 18px; }
.case-card span { color: var(--wood); font-size: 13px; font-weight: 700; }
.case-card p { color: var(--muted); margin-bottom: 0; }

.faq-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.faq-group details {
    margin-bottom: 12px;
    padding: 18px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.faq-group summary {
    cursor: pointer;
    font-weight: 700;
}

.faq-group p {
    margin: 12px 0 0;
    color: var(--muted);
}

.news-list {
    display: grid;
    gap: 18px;
}

.news-list span {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--wood);
    font-weight: 700;
}

.news-list time {
    display: block;
    margin-bottom: 12px;
    color: var(--muted);
}

.news-cover {
    width: 100%;
    max-height: 360px;
    object-fit: cover;
    border-radius: 8px;
    margin: 14px 0;
}

.text-link {
    display: inline-flex;
    margin-top: 14px;
    color: var(--leaf);
    font-weight: 700;
}

.article-body {
    max-width: 860px;
    padding: 34px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 12px 34px rgba(38, 32, 22, .06);
}

.article-body time {
    display: block;
    margin-bottom: 22px;
    color: var(--wood);
    font-weight: 700;
}

.article-body p {
    color: #3f463f;
    font-size: 17px;
}

.lead-text {
    color: var(--muted);
    font-size: 18px;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.cert-grid article {
    overflow: hidden;
    border-radius: 8px;
    background: var(--white);
    border: 1px solid var(--line);
}

.cert-grid img {
    aspect-ratio: 4 / 3;
    object-fit: contain;
    background: #eee;
}

.cert-grid h3 { padding: 16px; margin: 0; }

.contact-grid dl {
    margin: 0;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 24px;
}

.contact-grid dl div {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.contact-grid dl div:last-child { border-bottom: 0; }
.contact-grid dt { color: var(--wood); font-weight: 700; }
.contact-grid dd { margin: 0; color: var(--muted); }

.contact-band {
    padding: 42px 0;
    background: var(--leaf);
    color: var(--white);
}

.contact-band-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.contact-band span { color: #d8c095; font-weight: 700; }
.contact-band h2 { margin-bottom: 0; }

.site-footer {
    padding: 54px 0 26px;
    background: #20251f;
    color: var(--white);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 34px;
}

.footer-grid p,
.copyright { color: rgba(255,255,255,.72); }

.footer-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-badges span {
    padding: 6px 10px;
    background: rgba(255,255,255,.08);
    border-radius: 6px;
    font-size: 13px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.copyright {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 34px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,.12);
    font-size: 13px;
}

.float-cta {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 30;
    display: grid;
    gap: 8px;
}

.float-cta a {
    display: grid;
    place-items: center;
    min-width: 86px;
    min-height: 40px;
    padding: 0 12px;
    background: var(--wood);
    color: var(--white);
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0,0,0,.16);
    font-size: 14px;
    font-weight: 700;
}

@media (max-width: 980px) {
    .menu-toggle { display: block; }
    .site-nav {
        display: none;
        position: absolute;
        left: 16px;
        right: 16px;
        top: 112px;
        padding: 14px;
        background: var(--white);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
        justify-content: flex-start;
    }
    .site-nav.is-open { display: flex; }
    .page-hero-grid,
    .split-grid,
    .two-col,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero-photo { aspect-ratio: 16 / 10; }
    .space-grid,
    .advantage-grid,
    .feature-row,
    .pricing-grid,
    .process-grid,
    .case-grid,
    .cert-grid,
    .footer-grid,
    .response-band {
        grid-template-columns: repeat(2, 1fr);
    }
    .table-like article {
        grid-template-columns: 1fr;
    }
    .notice-panel { position: static; }
}

@media (max-width: 680px) {
    .topbar-inner,
    .contact-band-inner,
    .copyright {
        align-items: flex-start;
        flex-direction: column;
    }
    .page-hero { padding-top: 42px; }
    .section { padding: 52px 0; }
    .stats-strip,
    .space-grid,
    .advantage-grid,
    .feature-row,
    .pricing-grid,
    .process-grid,
    .case-grid,
    .cert-grid,
    .footer-grid,
    .response-band,
    .mini-case-grid,
    .timeline,
    .faq-layout {
        grid-template-columns: 1fr;
    }
    .float-cta {
        left: 12px;
        right: 12px;
        grid-template-columns: repeat(3, 1fr);
    }
    .float-cta a { min-width: 0; }
    body { padding-bottom: 56px; }
}