/* ============================================
   苏州天翼建材科技有限公司 · 全新组件库
   设计方向：建筑杂志感 / 超大数字 / 不对称 / 分屏叙事
   ============================================ */

:root {
    --ink: #111111;
    --ink-2: #1a1a1a;
    --paper: #f6f3ec;
    --paper-dark: #ece8df;
    --gold: #c8923b;
    --gold-bright: #e5b04d;
    --line: #d9d5cb;
    --line-dark: #2a2a2a;
    --muted: #6a6a6a;
    --serif: "Times New Roman", "Noto Serif SC", "Source Han Serif CN", Georgia, serif;
    --sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--sans);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.75;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: var(--gold); color: #fff; }

/* ===================== 顶栏 ===================== */
.topbar {
    width: 100%;
    background: var(--ink);
    color: #888;
    font-size: 12px;
    padding: 0;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid var(--line-dark);
}
.topbar-inner {
    max-width: 1440px;
    width: 100%;
    padding: 8px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar a { color: var(--gold-bright); }

/* ===================== 主导航 ===================== */
.masthead {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--ink);
    border-top: 1px solid var(--line-dark);
}
.masthead-inner {
    max-width: 1440px;
    margin: 0 auto;
    height: 72px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--paper);
}
.brand-logo {
    height: 37px;
    width: auto;
    display: block;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
    position: relative;
    top: -5px;
}
.footer-brand .brand-logo {
    height: 43px;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.4));
}
.brand-text {
    font-family: var(--serif);
    font-weight: 900;
    font-size: 18px;
    letter-spacing: -0.3px;
    color: var(--paper);
    line-height: 1.1;
}
.brand-text small {
    display: block;
    font-family: var(--mono);
    font-weight: 400;
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--muted);
    margin-top: 3px;
    text-transform: uppercase;
}
.footer-brand .brand-text small { color: #666; }
.brand-mark {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--gold);
    border: 1px solid var(--gold);
    padding: 2px 6px;
}
.brand-name { font-size: 18px; }
.brand-sub {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    display: none;
}
.masthead-nav {
    display: flex;
    gap: 40px;
    list-style: none;
    font-family: var(--serif);
    font-weight: 700;
    font-size: 15px;
}
.masthead-nav a {
    color: #b8b8b8;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: color .2s ease, border-color .2s ease;
}
.masthead-nav a:hover,
.masthead-nav a.active {
    color: var(--paper);
    border-bottom-color: var(--gold);
}
.masthead-tel {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--gold-bright);
    letter-spacing: 1px;
}

/* ===================== 巨型 Hero（数字叙事） ===================== */
.giant-hero {
    position: relative;
    min-height: calc(100vh - 112px);
    background: var(--ink);
    color: var(--paper);
    display: flex;
    align-items: center;
    overflow: hidden;
}
.giant-hero-bg {
    position: absolute;
    inset: 0;
    background: url('assets/hero-bg.webp') center/cover no-repeat;
    opacity: 0.18;
    filter: saturate(0.3) brightness(0.7);
}
.giant-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
}
.giant-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 1440px;
    margin: 0 auto;
    padding: 80px 40px;
    width: 100%;
}
.giant-hero-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 28px;
}
.giant-hero-label::before {
    content: '';
    display: inline-block;
    width: 48px;
    height: 1px;
    background: var(--gold);
    margin-right: 16px;
    vertical-align: middle;
}
.giant-hero h1 {
    font-family: var(--serif);
    font-weight: 900;
    font-size: clamp(44px, 7vw, 96px);
    line-height: 0.95;
    letter-spacing: -2px;
    margin-bottom: 40px;
}
.giant-hero h1 em {
    font-style: italic;
    color: var(--gold-bright);
    font-weight: 400;
}
.giant-hero-meta {
    display: grid;
    grid-template-columns: repeat(3, auto) 1fr;
    gap: 48px;
    align-items: end;
    border-top: 1px solid var(--line-dark);
    padding-top: 28px;
    max-width: 900px;
}
.ghm-item { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 1px; text-transform: uppercase; }
.ghm-item strong { display: block; font-family: var(--serif); font-size: clamp(24px, 3vw, 36px); color: var(--paper); letter-spacing: -1px; text-transform: none; margin-top: 8px; }
.ghm-item strong em { color: var(--gold-bright); font-style: normal; }

/* ===================== 数字条（数据驱动） ===================== */
.figure-strip {
    background: var(--paper);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.figure-strip-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
.fs-cell {
    padding: 48px 32px;
    border-right: 1px solid var(--line);
    position: relative;
}
.fs-cell:last-child { border-right: none; }
.fs-num {
    font-family: var(--serif);
    font-size: clamp(48px, 7vw, 88px);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -3px;
    color: var(--ink);
}
.fs-num em {
    font-style: italic;
    color: var(--gold);
    font-weight: 400;
}
.fs-num .unit {
    font-family: var(--mono);
    font-size: 16px;
    font-style: normal;
    font-weight: 700;
    color: var(--muted);
    letter-spacing: 0;
    margin-left: 4px;
}
.fs-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 16px;
}

/* ===================== 通用 Section ===================== */
.section {
    max-width: 1440px;
    margin: 0 auto;
    padding: 120px 40px;
}
.section-dark { background: var(--ink); color: var(--paper); }
.section-paper-dark { background: var(--paper-dark); }

/* ===================== 不对称分屏 ===================== */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 520px;
}
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split-media {
    position: relative;
    overflow: hidden;
}
.split-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.split-content {
    padding: 80px 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.split-content .sec-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 24px;
}
.split-content h2 {
    font-family: var(--serif);
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.15;
    margin-bottom: 28px;
}
.split-content p {
    font-size: 16px;
    color: #333;
    margin-bottom: 20px;
    max-width: 46ch;
}
.section-dark .split-content p { color: #ccc; }
.split-content .big-num {
    font-family: var(--serif);
    font-size: clamp(64px, 10vw, 140px);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -4px;
    color: var(--gold);
    margin-bottom: 24px;
}

/* 7:3 或 3:7 变体 */
.split-73 { grid-template-columns: 7fr 3fr; }
.split-37 { grid-template-columns: 3fr 7fr; }
.split-full-text { padding: 120px 80px; display: flex; flex-direction: column; justify-content: center; }

/* ===================== 引用块（正文强调） ===================== */
.pull-quote {
    border-left: 3px solid var(--gold);
    padding: 24px 32px;
    margin: 40px 0;
    font-family: var(--serif);
    font-size: clamp(22px, 2.8vw, 30px);
    line-height: 1.35;
    color: var(--ink);
    font-weight: 700;
}
.pull-quote em { font-style: italic; color: var(--gold); font-weight: 400; }

/* ===================== 技术要点（列表但不同） ===================== */
.tech-points {
    list-style: none;
}
.tech-points li {
    padding: 20px 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 24px;
    align-items: start;
}
.tech-points li:last-child { border-bottom: 1px solid var(--line); }
.tp-num {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--gold);
    padding-top: 4px;
}
.tp-text h4 {
    font-family: var(--serif);
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--ink);
}
.section-dark .tp-text h4 { color: var(--paper); }
.tp-text p { color: var(--muted); font-size: 14px; margin: 0; }

/* ===================== 新闻杂志列表 ===================== */
.magazine-list {
    display: grid;
    gap: 0;
}
.mag-item {
    display: grid;
    grid-template-columns: 160px 1fr 100px;
    gap: 40px;
    padding: 40px 0;
    border-top: 1px solid var(--line);
    align-items: center;
    cursor: pointer;
    transition: background .2s ease;
}
.mag-item:last-child { border-bottom: 1px solid var(--line); }
.mag-item:hover { background: #efeae0; padding-left: 16px; padding-right: 16px; }
.mag-date {
    font-family: var(--serif);
    text-align: left;
}
.mag-date .d { font-size: 44px; font-weight: 900; line-height: 1; letter-spacing: -2px; color: var(--gold); }
.mag-date .y { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-top: 8px; }
.mag-body h3 {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}
.mag-body p { color: var(--muted); font-size: 14px; }
.mag-tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--ink);
    border: 1px solid var(--ink);
    padding: 4px 10px;
    text-align: center;
    width: fit-content;
}

/* ===================== 横向滚动场景 ===================== */
.scene-strip {
    background: var(--ink);
    padding: 80px 0;
    overflow: hidden;
}
.scene-strip-header {
    max-width: 1440px;
    margin: 0 auto 40px;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: end;
}
.scene-strip-header h2 {
    font-family: var(--serif);
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 900;
    color: var(--paper);
    letter-spacing: -1px;
    line-height: 1.15;
}
.scene-strip-header .sub {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--gold);
    text-transform: uppercase;
}
.scene-track {
    display: flex;
    gap: 24px;
    padding: 0 40px;
    overflow-x: auto;
    scrollbar-width: none;
}
.scene-track::-webkit-scrollbar { display: none; }
.scene-card {
    flex: 0 0 420px;
    position: relative;
    height: 340px;
    overflow: hidden;
    cursor: pointer;
}
.scene-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
    filter: grayscale(30%);
}
.scene-card:hover img { transform: scale(1.05); filter: grayscale(0%); }
.scene-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    color: var(--paper);
}
.scene-caption .tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 8px;
}
.scene-caption h3 { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }

/* ===================== 时间线 ===================== */
.timeline {
    position: relative;
    padding: 40px 0;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 80px;
    width: 1px;
    background: var(--line);
}
.tl-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 32px;
    padding: 28px 0;
    align-items: start;
}
.tl-year {
    font-family: var(--serif);
    font-size: 28px;
    font-weight: 900;
    color: var(--gold);
    letter-spacing: -1px;
    text-align: right;
    padding-right: 16px;
    position: relative;
}
.tl-year::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 14px;
    width: 11px;
    height: 11px;
    background: var(--paper);
    border: 2px solid var(--gold);
    border-radius: 50%;
}
.tl-content h3 {
    font-family: var(--serif);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--ink);
}
.tl-content p { color: var(--muted); font-size: 14px; }

/* ===================== 极简 CTA ===================== */
.loud-call {
    padding: 140px 40px;
    text-align: center;
    background: var(--ink);
    color: var(--paper);
    position: relative;
}
.loud-call::before {
    content: '//';
    font-family: var(--mono);
    font-size: 14px;
    letter-spacing: 4px;
    color: var(--gold);
    position: absolute;
    top: 48px;
    left: 50%;
    transform: translateX(-50%);
}
.loud-call h2 {
    font-family: var(--serif);
    font-size: clamp(32px, 4vw, 56px);
    font-weight: 900;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 16px;
}
.loud-call h2 em { color: var(--gold); font-style: italic; font-weight: 400; }
.loud-call .sub {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 32px;
}
.loud-call .cta-links {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}
.loud-call a {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--paper);
    padding-bottom: 4px;
    border-bottom: 1px solid var(--gold);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}
.loud-call a:hover { color: var(--gold-bright); }

/* ===================== 分隔线 ===================== */
.rule {
    height: 1px;
    background: var(--line);
    margin: 0 auto;
    max-width: 1440px;
}
.rule-gold {
    height: 1px;
    background: var(--gold);
    width: 80px;
}

/* ===================== 页面内页头部 ===================== */
.page-header {
    background: var(--ink);
    color: var(--paper);
    padding: 100px 40px 80px;
}
.page-header-inner {
    max-width: 1440px;
    margin: 0 auto;
}
.page-header .ph-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 24px;
}
.page-header .ph-label::before {
    content: '';
    display: inline-block;
    width: 40px;
    height: 1px;
    background: var(--gold);
    margin-right: 12px;
    vertical-align: middle;
}
.page-header h1 {
    font-family: var(--serif);
    font-weight: 900;
    font-size: clamp(36px, 5vw, 72px);
    line-height: 1;
    letter-spacing: -2px;
    margin-bottom: 20px;
}
.page-header h1 em { color: var(--gold); font-style: italic; font-weight: 400; }
.page-header .ph-sub {
    max-width: 64ch;
    color: #aaa;
    font-size: 16px;
}

/* ===================== 产品参数表 ===================== */
.product-specs {
    max-width: 1440px;
    margin: 0 auto;
    padding: 80px 40px;
}
.product-specs h3 {
    font-family: var(--serif);
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 48px;
}
.ps-row {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.5fr;
    gap: 0;
    border-top: 1px solid var(--line);
}
.ps-row.header {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--paper-dark);
}
.ps-cell {
    padding: 20px 24px;
    border-right: 1px solid var(--line);
    align-self: center;
}
.ps-cell:last-child { border-right: none; }
.ps-row.header .ps-cell { font-weight: 700; }
.ps-row.data { transition: background .2s ease; }
.ps-row.data:hover { background: #efeae0; }
.ps-row.data .ps-cell:first-child {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 17px;
}

/* ===================== 联系分屏 ===================== */
.contact-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
}
.contact-left {
    background: var(--paper);
    padding: 100px 80px;
}
.contact-right {
    background: var(--ink);
    color: var(--paper);
    padding: 100px 80px;
    position: relative;
}
.contact-left h2, .contact-right h2 {
    font-family: var(--serif);
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.15;
    margin-bottom: 28px;
}
.contact-right h2 { color: var(--paper); }
.ci {
    padding: 24px 0;
    border-top: 1px solid var(--line);
}
.contact-right .ci { border-color: var(--line-dark); }
.ci:last-child { border-bottom: 1px solid var(--line); }
.contact-right .ci:last-child { border-color: var(--line-dark); }
.ci-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 6px;
}
.contact-right .ci-label { color: var(--gold); }
.ci-value {
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}
.contact-right .ci-value { color: var(--paper); }

/* ===================== 文章正文（新样式） ===================== */
.article-text {
    max-width: 760px;
    margin: 0 auto;
    padding: 80px 24px;
}
.article-text .lede {
    font-family: var(--serif);
    font-size: clamp(20px, 2.2vw, 26px);
    line-height: 1.5;
    color: var(--ink);
    margin-bottom: 48px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 32px;
}
.article-text h2 {
    font-family: var(--serif);
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 900;
    letter-spacing: -0.5px;
    margin: 48px 0 20px;
    line-height: 1.25;
}
.article-text h3 {
    font-family: var(--serif);
    font-size: 20px;
    font-weight: 700;
    margin: 32px 0 14px;
}
.article-text p { color: #222; margin-bottom: 18px; font-size: 16px; line-height: 1.8; }
.article-text ul { padding-left: 24px; margin-bottom: 18px; }
.article-text li { margin-bottom: 10px; color: #222; }

/* ===================== 页脚 ===================== */
.site-footer {
    background: var(--ink);
    color: var(--paper);
    padding: 80px 40px 32px;
}
.footer-top {
    max-width: 1440px;
    margin: 0 auto 48px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 64px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--line-dark);
}
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand p { color: #777; font-size: 14px; line-height: 1.9; max-width: 380px; }
.footer-col h4 {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 20px;
}
.footer-col a {
    display: block;
    color: #aaa;
    padding: 6px 0;
    font-size: 14px;
    font-family: var(--serif);
}
.footer-col a:hover { color: var(--gold-bright); }
.footer-bottom {
    max-width: 1440px;
    margin: 0 auto;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 1px;
    color: #555;
    padding-top: 24px;
}

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
    .split, .split-73, .split-37, .contact-split {
        grid-template-columns: 1fr;
    }
    .split-media { min-height: 360px; }
    .split-content, .contact-left, .contact-right {
        padding: 60px 32px;
    }
    .figure-strip-inner { grid-template-columns: repeat(2, 1fr); }
    .fs-cell:nth-child(2) { border-right: none; }
    .fs-cell:nth-child(3) { border-right: 1px solid var(--line); }
    .footer-top { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .giant-hero-meta { grid-template-columns: repeat(2, auto); gap: 32px; }
    .masthead-nav { gap: 20px; font-size: 14px; }
    .scene-card { flex: 0 0 320px; height: 260px; }
    .mag-item { grid-template-columns: 100px 1fr 80px; gap: 24px; }
}
@media (max-width: 720px) {
    .section { padding: 80px 24px; }
    .giant-hero-inner, .page-header-inner { padding: 60px 24px; }
    .figure-strip-inner { grid-template-columns: 1fr; }
    .fs-cell { border-right: none !important; border-bottom: 1px solid var(--line); }
    .masthead-inner { flex-wrap: wrap; height: auto; padding: 16px; gap: 12px; }
    .masthead-nav { order: 3; flex-basis: 100%; justify-content: center; }
    .masthead-tel { order: 2; }
    .topbar { display: none; }
    .ps-row { grid-template-columns: 1fr 1fr; }
    .ps-cell:nth-child(3) { display: none; }
    .timeline::before { left: 20px; }
    .tl-item { grid-template-columns: 40px 1fr; gap: 20px; }
    .tl-year { font-size: 20px; text-align: left; }
    .tl-year::after { right: auto; left: -6px; }
    .mag-item { grid-template-columns: 1fr; gap: 16px; }
    .scene-strip-header { flex-direction: column; gap: 12px; }
    .contact-left, .contact-right { padding: 60px 24px; }
}