:root {
    --ink: #17252d;
    --ink-deep: #0f1d24;
    --text: #34464e;
    --muted: #6d7b81;
    --paper: #f4f2ed;
    --surface: #faf9f6;
    --surface-muted: #e9ecea;
    --line: #c9cecc;
    --line-dark: #9ca7a4;
    --accent: #d76522;
    --accent-dark: #aa4613;
    --white: #ffffff;
    --shell: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-underline-offset: 4px;
}

a:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

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

h1, h2, h3 {
    line-height: 1.25;
    font-weight: 700;
    letter-spacing: -0.025em;
}

h1 {
    margin-bottom: 28px;
    font-size: clamp(2.8rem, 5vw, 4.7rem);
}

h2 {
    margin-bottom: 20px;
    font-size: clamp(2rem, 3.6vw, 3.25rem);
}

h3 { font-size: 1.15rem; }

.shell {
    width: var(--shell);
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    padding: 10px 15px;
    color: var(--white);
    background: var(--ink-deep);
    transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.top-strip {
    color: #d7ddda;
    background: var(--ink-deep);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.top-strip-inner {
    display: flex;
    min-height: 32px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--line);
    background: rgba(244, 242, 237, 0.96);
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    min-height: 86px;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    place-items: center;
    color: var(--white);
    background: var(--accent);
    font-family: Consolas, monospace;
    font-size: 0.86rem;
    font-weight: 700;
}

.brand-copy {
    display: grid;
    line-height: 1.2;
}

.brand-copy strong { font-size: 0.94rem; }

.brand-copy small {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.62rem;
    letter-spacing: 0.04em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 0.86rem;
    font-weight: 600;
}

.main-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    border-bottom: 2px solid transparent;
    text-decoration: none;
}

.main-nav a:hover { border-color: var(--accent); }

.hero {
    padding: 74px 0 92px;
    border-bottom: 1px solid var(--line);
    background:
        linear-gradient(rgba(23, 37, 45, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23, 37, 45, 0.035) 1px, transparent 1px);
    background-size: 46px 46px;
}

.section-marker {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 42px;
    color: var(--muted);
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
}

.section-marker span:first-child {
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
}

.section-marker::after {
    width: 64px;
    height: 1px;
    content: "";
    background: var(--line-dark);
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.75fr);
    gap: clamp(56px, 9vw, 120px);
    align-items: start;
}

.hero-label {
    margin-bottom: 22px;
    color: var(--accent-dark);
    font-size: 0.82rem;
    font-weight: 700;
}

.hero-lead {
    max-width: 720px;
    margin-bottom: 30px;
    color: var(--text);
    font-size: 1.08rem;
}

.text-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 26px;
}

.text-actions a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    gap: 12px;
    color: var(--ink-deep);
    border-bottom: 1px solid var(--ink-deep);
    font-size: 0.9rem;
    font-weight: 700;
    text-decoration: none;
}

.text-actions a:hover { color: var(--accent-dark); border-color: var(--accent); }

.application-file {
    border-top: 4px solid var(--accent);
    border-right: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
    border-left: 1px solid var(--line-dark);
    background: rgba(250, 249, 246, 0.92);
}

.file-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--line);
}

.file-heading span {
    color: var(--muted);
    font-family: Consolas, monospace;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
}

.file-heading strong { font-size: 0.92rem; }

.application-file dl { margin: 0; }

.application-file dl div {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 18px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--line);
}

.application-file dl div:last-child { border-bottom: 0; }

.application-file dt {
    color: var(--muted);
    font-size: 0.76rem;
}

.application-file dd {
    margin: 0;
    font-size: 0.84rem;
    font-weight: 600;
}

.status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    margin-right: 8px;
    border-radius: 50%;
    background: #2c8b5b;
}

.section { padding: 96px 0; }

.section-muted {
    border-block: 1px solid var(--line);
    background: var(--surface-muted);
}

.content-layout {
    display: grid;
    grid-template-columns: minmax(250px, 0.78fr) minmax(0, 1.22fr);
    gap: clamp(56px, 9vw, 120px);
}

.section-heading > p,
.security-intro > p:first-child {
    margin-bottom: 16px;
    color: var(--accent-dark);
    font-size: 0.8rem;
    font-weight: 700;
}

.section-heading h2 { font-size: clamp(2rem, 3.3vw, 3rem); }

.lead-copy {
    margin-bottom: 38px;
    color: var(--text);
    font-size: 1.07rem;
}

.company-table {
    margin: 0;
    border-top: 1px solid var(--line-dark);
}

.company-table div {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 24px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.company-table dt {
    color: var(--muted);
    font-size: 0.78rem;
}

.company-table dd {
    margin: 0;
    overflow-wrap: anywhere;
    font-size: 0.9rem;
}

.operation-list { border-top: 1px solid var(--line-dark); }

.operation-list article {
    display: grid;
    grid-template-columns: 74px 180px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.operation-code {
    color: var(--accent-dark);
    font-family: Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 700;
}

.operation-list h3 { margin-bottom: 0; }

.operation-list p {
    margin-bottom: 0;
    color: var(--text);
    font-size: 0.9rem;
}

.boundary-statement {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 30px;
    margin-top: 52px;
    padding: 24px 0;
    border-top: 2px solid var(--ink-deep);
    border-bottom: 1px solid var(--line-dark);
}

.boundary-statement strong { font-size: 0.9rem; }

.boundary-statement p { margin: 0; color: var(--text); font-size: 0.9rem; }

.security-block {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(50px, 8vw, 100px);
    padding: 54px;
    color: var(--white);
    background: var(--ink-deep);
}

.security-intro h2 { font-size: clamp(2rem, 3.6vw, 3.2rem); }

.security-intro > p:last-child { margin-bottom: 0; color: #bdc8c9; }

.security-rules { margin: 0; border-top: 1px solid #405058; }

.security-rules > div {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 18px;
    padding: 19px 0;
    border-bottom: 1px solid #405058;
}

.security-rules dt {
    color: #e4834a;
    font-family: Consolas, monospace;
    font-size: 0.74rem;
}

.security-rules dd { display: grid; gap: 4px; margin: 0; }

.security-rules strong { font-size: 0.9rem; }

.security-rules span { color: #aebbbc; font-size: 0.82rem; }

.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }

.process-list li {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 24px;
    padding: 23px 0;
    border-bottom: 1px solid var(--line);
}

.process-list li > span {
    color: var(--accent-dark);
    font-family: Consolas, monospace;
    font-size: 0.84rem;
    font-weight: 700;
}

.process-list p { margin: 5px 0 0; color: var(--text); font-size: 0.9rem; }

.faq-list { border-top: 1px solid var(--line-dark); }

.faq-list details { border-bottom: 1px solid var(--line); }

.faq-list summary {
    min-height: 60px;
    padding: 18px 36px 18px 0;
    cursor: pointer;
    font-size: 0.94rem;
    font-weight: 700;
}

.faq-list details p {
    max-width: 720px;
    padding: 0 28px 20px 0;
    color: var(--text);
    font-size: 0.9rem;
}

.site-footer {
    padding: 54px 0 28px;
    color: #dbe2df;
    background: var(--ink-deep);
}

.footer-grid,
.footer-bottom {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 30px;
}

.footer-company { display: grid; gap: 5px; }
.footer-company span { color: #89999c; font-size: 0.74rem; }

.footer-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 0.84rem; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: #e4834a; }

.footer-bottom {
    margin-top: 38px;
    padding-top: 22px;
    border-top: 1px solid #34444b;
    color: #839397;
    font-size: 0.72rem;
}

.legal-hero {
    padding: 76px 0 48px;
    border-bottom: 1px solid var(--line);
}

.legal-hero .eyebrow {
    margin-bottom: 18px;
    color: var(--accent-dark);
    font-family: Consolas, monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
}

.legal-hero h1 { font-size: clamp(2.8rem, 5vw, 4.6rem); }
.legal-summary { max-width: 760px; color: var(--text); font-size: 1.05rem; }

.legal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 32px;
    margin-top: 26px;
    color: var(--muted);
    font-size: 0.8rem;
}

.legal-layout {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: clamp(48px, 8vw, 100px);
    padding-top: 58px;
    padding-bottom: 100px;
}

.legal-nav {
    position: sticky;
    top: 112px;
    align-self: start;
    padding-top: 16px;
    border-top: 3px solid var(--accent);
}

.legal-nav strong { display: block; margin-bottom: 12px; font-size: 0.9rem; }
.legal-nav a { display: block; padding: 5px 0; color: var(--muted); font-size: 0.8rem; text-decoration: none; }
.legal-nav a:hover { color: var(--accent-dark); }

.legal-article { max-width: 820px; }
.legal-article section { padding: 30px 0; border-top: 1px solid var(--line); scroll-margin-top: 112px; }
.legal-article h2 { font-size: 1.35rem; }
.legal-article p, .legal-article li { color: var(--text); }
.legal-article ul { padding-left: 20px; }

.legal-notice {
    margin-bottom: 34px;
    padding: 18px 20px;
    border-left: 4px solid var(--accent);
    background: #eee8df;
    color: var(--text);
}

@media (max-width: 980px) {
    .header-inner { align-items: flex-start; flex-direction: column; padding: 15px 0; }
    .main-nav { width: 100%; gap: 18px; overflow-x: auto; white-space: nowrap; }
    .hero-layout, .content-layout, .security-block { grid-template-columns: 1fr; }
    .application-file { max-width: 620px; }
    .operation-list article { grid-template-columns: 64px 160px minmax(0, 1fr); }
    .legal-layout { grid-template-columns: 1fr; }
    .legal-nav { position: static; columns: 2; }
}

@media (max-width: 640px) {
    :root { --shell: min(100% - 28px, 1180px); }
    .top-strip-inner span:last-child { display: none; }
    .brand-copy strong { font-size: 0.82rem; }
    .brand-copy small { display: none; }
    .hero { padding: 52px 0 64px; }
    h1 { font-size: clamp(2.5rem, 12vw, 3.7rem); }
    .section { padding: 70px 0; }
    .section-marker { margin-bottom: 30px; }
    .application-file dl div, .company-table div { grid-template-columns: 1fr; gap: 4px; }
    .operation-list article { grid-template-columns: 52px minmax(0, 1fr); gap: 16px; }
    .operation-list article p { grid-column: 2; }
    .boundary-statement { grid-template-columns: 1fr; gap: 8px; }
    .security-block { padding: 30px 22px; }
    .footer-grid, .footer-bottom { flex-direction: column; }
    .legal-nav { columns: 1; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: 0.01ms !important; }
}