:root {
    --brand: #C85C3A;
    --brand-soft: #E6B85C;
    --ink: #2B2523;
    --text: #332E2B;
    --muted: #766C66;
    --accent: #D94A32;
    --paper: #FAF7F2;
    --paper-2: #F1EAE2;
    --line: rgba(43, 37, 35, 0.14);
    --line-strong: rgba(43, 37, 35, 0.24);
    --shadow: 0 18px 46px rgba(67, 45, 35, 0.09);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --shell: 1180px;
    --reading: 760px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background: var(--paper);
}

body {
    margin: 0;
    color: var(--text);
    background:
        linear-gradient(180deg, rgba(230, 184, 92, 0.05), transparent 340px),
        var(--paper);
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.76;
    text-rendering: optimizeLegibility;
}

body.modal-open {
    overflow: hidden;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
    text-decoration-color: rgba(200, 92, 58, 0.48);
    text-underline-offset: 0.2em;
}

a:hover {
    color: var(--brand);
    text-decoration-color: var(--brand);
}

button {
    color: inherit;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 9999;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--ink);
    color: #fff;
    transform: translateY(-180%);
}

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

.shell {
    width: min(calc(100% - 48px), var(--shell));
    margin-inline: auto;
}

.reading-shell {
    width: min(calc(100% - 48px), var(--reading));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    border-bottom: 1px solid transparent;
    background: rgba(250, 247, 242, 0.94);
    backdrop-filter: blur(14px);
    transition: border-color 180ms ease, box-shadow 180ms ease;
}

.site-header[data-scrolled] {
    border-color: var(--line);
    box-shadow: 0 8px 30px rgba(43, 37, 35, 0.06);
}

.site-header__inner {
    min-height: 78px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 28px;
}

.brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 190px;
    color: var(--ink);
    text-decoration: none;
}

.brand-lockup img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.brand-lockup__text {
    display: grid;
    line-height: 1.15;
}

.brand-lockup__text strong {
    font-size: 1.08rem;
    letter-spacing: 0.04em;
}

.brand-lockup__text small {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.74rem;
}

.primary-nav {
    justify-self: center;
}

.primary-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 0;
}

.primary-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 13px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.94rem;
    text-decoration: none;
    transition: background 160ms ease, color 160ms ease;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
    background: var(--paper-2);
    color: var(--ink);
}

.primary-nav a[aria-current="page"] {
    box-shadow: inset 0 0 0 1px rgba(200, 92, 58, 0.18);
}

.search-trigger,
.menu-toggle,
.back-top,
.search-modal__close {
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
}

.search-trigger {
    min-height: 42px;
    padding: 0 16px;
    background: var(--ink);
    border-color: var(--ink);
    color: #fff;
}

.search-trigger:hover {
    background: var(--brand);
    border-color: var(--brand);
}

.menu-toggle {
    display: none;
    min-height: 42px;
    padding: 0 14px;
}

.search-modal[hidden]{
    display:none !important;
}

.search-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: grid;
    place-items: start center;
    padding: clamp(72px, 12vh, 140px) 24px 24px;
}

.search-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(43, 37, 35, 0.58);
    backdrop-filter: blur(4px);
}

.search-modal__dialog {
    position: relative;
    width: min(720px, 100%);
    padding: clamp(24px, 5vw, 46px);
    border: 1px solid rgba(255, 255, 255, 0.42);
    border-radius: var(--radius-lg);
    background: var(--paper);
    box-shadow: 0 30px 90px rgba(43, 37, 35, 0.3);
}

.search-modal__close {
    position: absolute;
    top: 18px;
    right: 18px;
    padding: 8px 13px;
    background: #fff;
}

.search-modal__intro {
    padding-right: 70px;
}

.search-modal__intro h2 {
    margin: 5px 0 8px;
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    line-height: 1.2;
}

.search-modal__intro p:last-child {
    margin: 0;
    color: var(--muted);
}

.search-form {
    margin-top: 28px;
}

.search-form label {
    display: block;
    margin-bottom: 8px;
    color: var(--ink);
    font-weight: 700;
}

.search-form__row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.search-form input {
    width: 100%;
    min-width: 0;
    min-height: 50px;
    padding: 0 16px;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    background: #fff;
    color: var(--ink);
    outline: none;
}

.search-form input:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(200, 92, 58, 0.12);
}

.search-form button,
.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    border: 1px solid var(--brand);
    border-radius: 12px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.search-form button:hover,
.button-link:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.button-link--ghost {
    background: transparent;
    color: var(--brand);
}

.button-link--ghost:hover {
    color: #fff;
}

main {
    overflow: clip;
}

.eyebrow {
    margin: 0;
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--brand);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.section-kicker::before {
    content: "";
    width: 22px;
    height: 2px;
    background: currentColor;
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(260px, 0.5fr);
    align-items: end;
    gap: 48px;
    margin-bottom: 34px;
}

.section-heading h2 {
    margin: 7px 0 0;
    color: var(--ink);
    font-size: clamp(1.9rem, 4vw, 3.4rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.section-heading p {
    margin: 0;
    color: var(--muted);
}

.home-intro {
    padding: clamp(42px, 7vw, 82px) 0 34px;
}

.home-intro__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.62fr);
    gap: clamp(34px, 6vw, 78px);
    align-items: start;
}

.home-intro__copy h1 {
    max-width: 850px;
    margin: 12px 0 22px;
    color: var(--ink);
    font-size: clamp(2.8rem, 6.4vw, 6.35rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}

.home-intro__copy h1 span {
    display: block;
    color: var(--brand);
}

.home-intro__lead {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: clamp(1.03rem, 1.5vw, 1.2rem);
    line-height: 1.85;
}

.home-intro__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.9rem;
}

.home-intro__meta strong {
    color: var(--ink);
}

.entry-rail {
    border-top: 3px solid var(--ink);
    background: rgba(241, 234, 226, 0.72);
}

.entry-rail__head {
    padding: 18px 20px 15px;
    border-bottom: 1px solid var(--line);
}

.entry-rail__head strong {
    display: block;
    color: var(--ink);
    font-size: 1rem;
}

.entry-rail__head span {
    color: var(--muted);
    font-size: 0.84rem;
}

.entry-rail ol {
    list-style: none;
    margin: 0;
    padding: 0;
}

.entry-rail li + li {
    border-top: 1px solid var(--line);
}

.entry-rail a {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 10px;
    padding: 18px 20px;
    text-decoration: none;
}

.entry-rail a:hover {
    background: rgba(255, 255, 255, 0.48);
}

.entry-rail__num {
    color: var(--brand);
    font-weight: 800;
}

.entry-rail__body strong {
    display: block;
    color: var(--ink);
}

.entry-rail__body small {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    line-height: 1.55;
}

.home-visual-strip {
    margin-top: 38px;
}

.home-visual-strip__frame {
    position: relative;
    min-height: 330px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--paper-2);
}

.home-visual-strip__frame img {
    width: 100%;
    height: clamp(330px, 48vw, 520px);
    object-fit: cover;
}

.home-visual-strip__note {
    position: absolute;
    right: 24px;
    bottom: 24px;
    width: min(380px, calc(100% - 48px));
    padding: 18px 20px;
    border-radius: 16px;
    background: rgba(250, 247, 242, 0.93);
    box-shadow: var(--shadow);
}

.home-visual-strip__note strong {
    display: block;
    color: var(--ink);
}

.home-visual-strip__note span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.9rem;
}

.route-section {
    padding: clamp(70px, 10vw, 125px) 0;
}

.route-ledger {
    border-top: 1px solid var(--ink);
}

.route-ledger__item {
    display: grid;
    grid-template-columns: 150px minmax(220px, 0.7fr) minmax(280px, 1fr) auto;
    gap: 26px;
    align-items: start;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
}

.route-ledger__eyebrow {
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.07em;
}

.route-ledger__item h3 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.route-ledger__item p {
    margin: 0;
    color: var(--muted);
}

.route-ledger__item a {
    white-space: nowrap;
    color: var(--brand);
    font-weight: 700;
}

.identity-note {
    padding: clamp(60px, 8vw, 96px) 0;
    background: var(--ink);
    color: #fff;
}

.identity-note__grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.52fr) minmax(0, 1fr);
    gap: clamp(38px, 7vw, 90px);
}

.identity-note h2 {
    margin: 8px 0 0;
    color: #fff;
    font-size: clamp(2rem, 4vw, 3.8rem);
    line-height: 1.08;
}

.identity-note__body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.identity-note__body p {
    margin: 0;
    color: rgba(255, 255, 255, 0.74);
}

.identity-note__body strong {
    color: #fff;
}

.community-preview {
    padding: clamp(72px, 10vw, 128px) 0;
}

.community-preview__grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.2fr);
    gap: clamp(36px, 7vw, 84px);
    align-items: start;
}

.community-preview__visual {
    position: sticky;
    top: 110px;
}

.community-preview__visual img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border-radius: 26px 26px 90px 26px;
}

.community-preview__visual figcaption {
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.86rem;
}

.topic-stack {
    border-top: 1px solid var(--ink);
}

.topic-stack article {
    padding: 24px 0 28px;
    border-bottom: 1px solid var(--line);
}

.topic-stack h3 {
    margin: 0 0 7px;
    color: var(--ink);
    font-size: 1.32rem;
}

.topic-stack p {
    margin: 0;
    color: var(--muted);
}

.topic-stack a {
    display: inline-block;
    margin-top: 12px;
    color: var(--brand);
    font-weight: 700;
}

.mobile-band {
    padding: clamp(65px, 9vw, 110px) 0;
    background: var(--paper-2);
}

.mobile-band__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(40px, 8vw, 100px);
    align-items: center;
}

.mobile-band__copy h2 {
    max-width: 780px;
    margin: 8px 0 18px;
    color: var(--ink);
    font-size: clamp(2rem, 5vw, 4.5rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
}

.mobile-band__copy > p {
    max-width: 680px;
    color: var(--muted);
}

.mobile-band__steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin: 30px 0 0;
}

.mobile-band__steps div {
    padding-top: 14px;
    border-top: 2px solid var(--brand-soft);
}

.mobile-band__steps strong {
    display: block;
    color: var(--ink);
}

.mobile-band__steps span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.88rem;
}

.mobile-band__visual {
    position: relative;
}

.mobile-band__visual img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    border-radius: 120px 120px 24px 24px;
}

.editorial-method {
    padding: clamp(74px, 10vw, 126px) 0;
}

.method-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
}

.method-grid article {
    min-height: 240px;
    padding: 26px 22px 30px;
    border-right: 1px solid var(--line);
}

.method-grid article:last-child {
    border-right: 0;
}

.method-grid span {
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 800;
}

.method-grid h3 {
    margin: 12px 0 10px;
    color: var(--ink);
    font-size: 1.16rem;
    line-height: 1.35;
}

.method-grid p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.article-shelf {
    padding: clamp(72px, 9vw, 115px) 0;
    background: rgba(241, 234, 226, 0.58);
}

.article-shelf__lead {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 42px;
    align-items: end;
    margin-bottom: 34px;
}

.article-shelf__lead h2 {
    margin: 8px 0 0;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.1;
}

.article-shelf__lead p {
    margin: 0;
    color: var(--muted);
}

.article-shelf__grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
}

.article-card {
    grid-column: span 4;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--paper);
}

.article-card:nth-child(1),
.article-card:nth-child(5) {
    grid-column: span 6;
}

.article-card:nth-child(2),
.article-card:nth-child(3),
.article-card:nth-child(4) {
    grid-column: span 3;
}

.article-card__image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--paper-2);
}

.article-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 220ms ease;
}

.article-card:hover .article-card__image img {
    transform: scale(1.025);
}

.article-card__body {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 20px;
}

.article-card__meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: 0.78rem;
}

.article-card h3 {
    margin: 10px 0 9px;
    color: var(--ink);
    font-size: 1.15rem;
    line-height: 1.45;
}

.article-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.article-card__link {
    margin-top: auto;
    padding-top: 16px;
    color: var(--brand);
    font-weight: 700;
}

.secondary-topic {
    padding: clamp(70px, 9vw, 112px) 0;
}

.secondary-topic__box {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(320px, 1.28fr);
    gap: clamp(38px, 7vw, 90px);
    padding: clamp(30px, 5vw, 60px);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
}

.secondary-topic__visual img {
    width: 100%;
    height: 100%;
    min-height: 330px;
    object-fit: cover;
    border-radius: 18px;
}

.secondary-topic__copy h2 {
    margin: 8px 0 16px;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 3.6rem);
    line-height: 1.08;
}

.secondary-topic__copy p {
    color: var(--muted);
}

.secondary-topic__copy ul {
    margin: 22px 0;
    padding-left: 1.2em;
}

.secondary-topic__copy li + li {
    margin-top: 8px;
}

.home-faq {
    padding: 30px 0 clamp(84px, 10vw, 132px);
}

.faq-inline {
    display: grid;
    grid-template-columns: minmax(250px, 0.46fr) minmax(0, 1fr);
    gap: clamp(38px, 7vw, 90px);
}

.faq-inline__intro h2 {
    margin: 8px 0 12px;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.1;
}

.faq-inline__intro p {
    color: var(--muted);
}

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

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

.faq-question {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: center;
    padding: 21px 0;
    border: 0;
    background: transparent;
    color: var(--ink);
    text-align: left;
    font-weight: 750;
    cursor: pointer;
}

.faq-question::after {
    content: "+";
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--brand);
}

.faq-question[aria-expanded="true"]::after {
    content: "−";
}

.faq-answer {
    padding: 0 48px 22px 0;
    color: var(--muted);
}

.faq-answer[hidden] {
    display: none;
}

.page-hero {
    padding: clamp(50px, 8vw, 98px) 0 48px;
}

.page-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.48fr);
    gap: clamp(36px, 7vw, 86px);
    align-items: end;
}

.page-hero__copy h1 {
    max-width: 840px;
    margin: 10px 0 18px;
    color: var(--ink);
    font-size: clamp(2.6rem, 5.5vw, 5.3rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.page-hero__copy > p {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    font-size: 1.06rem;
}

.page-hero__aside {
    padding: 22px 0 4px 24px;
    border-left: 2px solid var(--brand-soft);
}

.page-hero__aside strong {
    display: block;
    color: var(--ink);
}

.page-hero__aside p {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-hero__image {
    margin-top: 36px;
    overflow: hidden;
    border-radius: 24px;
}

.page-hero__image img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
}

.breadcrumbs {
    padding: 18px 0 0;
}

.breadcrumbs ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin: 0;
    padding: 0;
    color: var(--muted);
    font-size: 0.82rem;
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: 7px;
    color: rgba(118, 108, 102, 0.52);
}

.breadcrumbs a {
    text-decoration: none;
}

.content-section {
    padding: clamp(60px, 8vw, 100px) 0;
}

.content-section--tinted {
    background: var(--paper-2);
}

.content-section--dark {
    background: var(--ink);
    color: #fff;
}

.content-section--dark h2,
.content-section--dark h3,
.content-section--dark strong {
    color: #fff;
}

.content-section--dark p,
.content-section--dark li {
    color: rgba(255, 255, 255, 0.74);
}

.two-column-copy {
    display: grid;
    grid-template-columns: minmax(240px, 0.5fr) minmax(0, 1fr);
    gap: clamp(40px, 8vw, 90px);
}

.two-column-copy h2 {
    margin: 8px 0 0;
    color: var(--ink);
    font-size: clamp(1.9rem, 4vw, 3.4rem);
    line-height: 1.1;
}

.prose-column {
    max-width: 800px;
}

.prose-column p {
    margin: 0 0 1.15em;
    color: var(--muted);
}

.prose-column p:last-child {
    margin-bottom: 0;
}

.prose-column strong {
    color: var(--ink);
}

.community-groups {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.community-group {
    padding: 28px;
    border-top: 3px solid var(--brand);
    background: rgba(255, 255, 255, 0.52);
}

.community-group h3 {
    margin: 0 0 8px;
    color: var(--ink);
    font-size: 1.3rem;
}

.community-group p {
    margin: 0;
    color: var(--muted);
}

.community-group ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 18px 0 0;
    padding: 0;
}

.community-group li {
    padding: 5px 9px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.78rem;
}

.scenario-list {
    border-top: 1px solid var(--ink);
}

.scenario-item {
    display: grid;
    grid-template-columns: 58px minmax(220px, 0.42fr) minmax(0, 1fr);
    gap: 22px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.scenario-item__num {
    color: var(--brand);
    font-weight: 800;
}

.scenario-item h3 {
    margin: 0;
    color: var(--ink);
    font-size: 1.2rem;
}

.scenario-item p {
    margin: 0;
    color: var(--muted);
}

.status-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    overflow: hidden;
    border: 1px solid var(--line);
    background: var(--line);
}

.status-board article {
    padding: 24px;
    background: var(--paper);
}

.status-board strong {
    display: block;
    color: var(--ink);
    font-size: 1.06rem;
}

.status-board p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.91rem;
}

.guide-index {
    display: grid;
    grid-template-columns: 0.55fr 1fr;
    gap: clamp(38px, 7vw, 80px);
}

.guide-index__nav {
    align-self: start;
    border-top: 2px solid var(--ink);
}

.guide-index__nav a {
    display: block;
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    font-weight: 700;
    text-decoration: none;
}

.guide-index__content section + section {
    margin-top: 52px;
    padding-top: 52px;
    border-top: 1px solid var(--line);
}

.guide-index__content h2 {
    margin: 0 0 12px;
    color: var(--ink);
    font-size: clamp(1.65rem, 3vw, 2.45rem);
    line-height: 1.2;
}

.guide-index__content p,
.guide-index__content li {
    color: var(--muted);
}

.guide-index__content ul,
.guide-index__content ol {
    padding-left: 1.3em;
}

.guide-index__content li + li {
    margin-top: 8px;
}

.article-index {
    padding: 20px 0 clamp(84px, 10vw, 128px);
}

.article-index__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 18px 0;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line);
}

.article-index__toolbar p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.article-index__rows {
    border-bottom: 1px solid var(--ink);
}

.article-row {
    display: grid;
    grid-template-columns: 145px minmax(240px, 0.72fr) minmax(280px, 1fr) auto;
    gap: 28px;
    align-items: start;
    padding: 26px 0;
    border-bottom: 1px solid var(--line);
}

.article-row:last-child {
    border-bottom: 0;
}

.article-row__meta {
    color: var(--muted);
    font-size: 0.8rem;
}

.article-row__meta span {
    display: block;
}

.article-row h2 {
    margin: 0;
    color: var(--ink);
    font-size: 1.28rem;
    line-height: 1.45;
}

.article-row p {
    margin: 0;
    color: var(--muted);
}

.article-row a {
    color: var(--brand);
    font-weight: 700;
    white-space: nowrap;
}

.article-detail {
    padding: clamp(42px, 7vw, 82px) 0 clamp(82px, 10vw, 130px);
}

.article-detail__header {
    width: min(calc(100% - 48px), 920px);
    margin-inline: auto;
}

.article-detail__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    color: var(--muted);
    font-size: 0.82rem;
}

.article-detail h1 {
    margin: 14px 0 18px;
    color: var(--ink);
    font-size: clamp(2.35rem, 5vw, 4.7rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.article-detail__summary {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.article-detail__cover {
    width: min(calc(100% - 48px), 1080px);
    margin: 38px auto 0;
    overflow: hidden;
    border-radius: 26px;
}

.article-detail__cover img {
    width: 100%;
    max-height: 580px;
    object-fit: cover;
}

.article-detail__body {
    width: min(calc(100% - 48px), 780px);
    margin: 52px auto 0;
}

.article-detail__body section + section {
    margin-top: 44px;
    padding-top: 44px;
    border-top: 1px solid var(--line);
}

.article-detail__body h2 {
    margin: 0 0 16px;
    color: var(--ink);
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    line-height: 1.25;
}

.article-detail__body p {
    margin: 0 0 1.1em;
    color: var(--text);
    font-size: 1.03rem;
}

.article-detail__body p:last-child {
    margin-bottom: 0;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 42px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.article-tags span {
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--paper-2);
    color: var(--muted);
    font-size: 0.78rem;
}

.related-reading {
    width: min(calc(100% - 48px), 1080px);
    margin: 0 auto clamp(85px, 10vw, 130px);
    padding-top: 40px;
    border-top: 2px solid var(--ink);
}

.related-reading__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-reading article {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.related-reading h2 {
    margin: 0 0 24px;
    color: var(--ink);
    font-size: 1.65rem;
}

.related-reading h3 {
    margin: 0 0 8px;
    color: var(--ink);
    font-size: 1.03rem;
    line-height: 1.5;
}

.related-reading p {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 0.88rem;
}

.related-reading a {
    color: var(--brand);
    font-weight: 700;
}

.notice-box {
    padding: 22px 24px;
    border-left: 4px solid var(--brand-soft);
    background: var(--paper-2);
}

.notice-box strong {
    display: block;
    color: var(--ink);
}

.notice-box p {
    margin: 6px 0 0;
    color: var(--muted);
}

.policy-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(36px, 7vw, 80px);
    padding: 20px 0 clamp(86px, 10vw, 130px);
}

.policy-nav {
    align-self: start;
    position: sticky;
    top: 110px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.42);
}

.policy-nav strong {
    display: block;
    margin-bottom: 8px;
    color: var(--ink);
}

.policy-nav a {
    display: block;
    padding: 7px 0;
    color: var(--muted);
    font-size: 0.9rem;
    text-decoration: none;
}

.policy-content {
    max-width: 780px;
}

.policy-content section + section {
    margin-top: 46px;
    padding-top: 46px;
    border-top: 1px solid var(--line);
}

.policy-content h2 {
    margin: 0 0 14px;
    color: var(--ink);
    font-size: clamp(1.55rem, 3vw, 2.25rem);
}

.policy-content h3 {
    margin: 28px 0 8px;
    color: var(--ink);
    font-size: 1.12rem;
}

.policy-content p,
.policy-content li {
    color: var(--muted);
}

.policy-content ul,
.policy-content ol {
    padding-left: 1.25em;
}

.policy-content li + li {
    margin-top: 7px;
}

.contact-board {
    display: grid;
    grid-template-columns: minmax(260px, 0.58fr) minmax(0, 1fr);
    gap: clamp(34px, 7vw, 80px);
    padding: 20px 0 clamp(90px, 10vw, 130px);
}

.contact-card {
    padding: 28px;
    border-top: 4px solid var(--brand);
    background: var(--paper-2);
}

.contact-card h2 {
    margin: 0 0 9px;
    color: var(--ink);
    font-size: 1.45rem;
}

.contact-card p {
    margin: 0;
    color: var(--muted);
}

.contact-card code {
    display: inline-block;
    margin-top: 16px;
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--ink);
    color: #fff;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.contact-notes {
    border-top: 1px solid var(--ink);
}

.contact-notes article {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.contact-notes h3 {
    margin: 0 0 7px;
    color: var(--ink);
}

.contact-notes p {
    margin: 0;
    color: var(--muted);
}

.search-page {
    padding: clamp(50px, 8vw, 88px) 0 clamp(86px, 10vw, 130px);
}

.search-page h1 {
    margin: 10px 0 12px;
    color: var(--ink);
    font-size: clamp(2.4rem, 5vw, 4.8rem);
    line-height: 1.05;
}

.search-page__intro {
    max-width: 700px;
    color: var(--muted);
}

.search-page__form {
    max-width: 760px;
    margin-top: 30px;
}

.search-results {
    margin-top: 48px;
    border-top: 1px solid var(--ink);
}

.search-result {
    display: grid;
    grid-template-columns: 130px 1fr auto;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.search-result__type {
    color: var(--brand);
    font-size: 0.8rem;
    font-weight: 800;
}

.search-result h2 {
    margin: 0 0 7px;
    color: var(--ink);
    font-size: 1.18rem;
}

.search-result p {
    margin: 0;
    color: var(--muted);
}

.search-result > a {
    color: var(--brand);
    font-weight: 700;
    white-space: nowrap;
}

.empty-state {
    margin-top: 42px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--paper-2);
}

.empty-state h2 {
    margin: 0 0 8px;
    color: var(--ink);
}

.empty-state p {
    margin: 0;
    color: var(--muted);
}

.empty-state ul {
    margin: 18px 0 0;
    padding-left: 1.2em;
}

.error-page {
    min-height: 68vh;
    display: grid;
    place-items: center;
    padding: 70px 0 100px;
}

.error-page__grid {
    display: grid;
    grid-template-columns: 0.55fr 1fr;
    gap: clamp(40px, 9vw, 110px);
    align-items: center;
}

.error-code {
    color: var(--brand);
    font-size: clamp(7rem, 18vw, 15rem);
    font-weight: 900;
    line-height: 0.8;
    letter-spacing: -0.08em;
}

.error-page h1 {
    margin: 0 0 14px;
    color: var(--ink);
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.05;
}

.error-page p {
    color: var(--muted);
}

.error-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.site-footer {
    border-top: 1px solid var(--line);
    background: var(--paper-2);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 0.72fr);
    gap: clamp(28px, 5vw, 60px);
    padding: 58px 0 48px;
}

.site-footer__brand {
    max-width: 360px;
}

.footer-brand {
    color: var(--ink);
    font-size: 1.42rem;
    font-weight: 900;
    text-decoration: none;
}

.site-footer__brand p {
    color: var(--muted);
    font-size: 0.9rem;
}

.site-footer h2 {
    margin: 0 0 12px;
    color: var(--ink);
    font-size: 0.92rem;
}

.site-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer li + li {
    margin-top: 7px;
}

.site-footer li a {
    color: var(--muted);
    font-size: 0.88rem;
    text-decoration: none;
}

.site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 0 30px;
    border-top: 1px solid var(--line);
}

.site-footer__bottom p {
    margin: 0;
    color: var(--muted);
    font-size: 0.8rem;
}

.back-top {
    min-width: 92px;
    padding: 7px 12px;
    color: var(--muted);
    font-size: 0.8rem;
}

.back-top:hover {
    border-color: var(--brand);
    color: var(--brand);
}

@media (max-width: 1100px) {
    .site-header__inner {
        grid-template-columns: auto auto 1fr auto;
        gap: 14px;
    }

    .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .primary-nav {
        display: none;
        position: absolute;
        top: calc(100% + 1px);
        left: 24px;
        right: 24px;
        padding: 14px;
        border: 1px solid var(--line);
        border-radius: 16px;
        background: var(--paper);
        box-shadow: var(--shadow);
    }

    .primary-nav[data-open] {
        display: block;
    }

    .primary-nav ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

    .primary-nav a {
        width: 100%;
        justify-content: center;
    }

    .home-intro__grid,
    .page-hero__grid {
        grid-template-columns: 1fr;
    }

    .entry-rail {
        display: grid;
        grid-template-columns: 220px 1fr;
    }

    .entry-rail ol {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

    .entry-rail li:nth-child(even) {
        border-left: 1px solid var(--line);
    }

    .route-ledger__item,
    .article-row {
        grid-template-columns: 120px minmax(220px, 0.72fr) 1fr;
    }

    .route-ledger__item a,
    .article-row > a {
        grid-column: 2 / -1;
        justify-self: start;
    }

    .method-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .method-grid article:nth-child(3) {
        border-right: 0;
    }

    .method-grid article:nth-child(n+4) {
        border-top: 1px solid var(--line);
    }

    .article-card,
    .article-card:nth-child(n) {
        grid-column: span 6;
    }

    .status-board {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .section-heading,
    .article-shelf__lead,
    .identity-note__grid,
    .community-preview__grid,
    .mobile-band__layout,
    .secondary-topic__box,
    .faq-inline,
    .two-column-copy,
    .guide-index,
    .contact-board {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .community-preview__visual {
        position: static;
    }

    .community-preview__visual img {
        aspect-ratio: 16 / 9;
        border-radius: 24px;
    }

    .mobile-band__visual {
        max-width: 480px;
    }

    .mobile-band__visual img {
        max-height: 360px;
        border-radius: 24px 90px 24px 24px;
    }

    .identity-note__body {
        grid-template-columns: 1fr;
    }

    .community-groups {
        grid-template-columns: 1fr;
    }

    .policy-layout {
        grid-template-columns: 1fr;
    }

    .policy-nav {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 6px 14px;
    }

    .policy-nav strong {
        width: 100%;
    }

    .site-footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .site-footer__brand {
        max-width: none;
    }
}

@media (max-width: 768px) {
    .shell,
    .reading-shell,
    .article-detail__header,
    .article-detail__cover,
    .article-detail__body,
    .related-reading {
        width: min(calc(100% - 32px), var(--shell));
    }

    .site-header__inner {
        min-height: 68px;
        grid-template-columns: 1fr auto auto;
    }

    .brand-lockup {
        min-width: 0;
    }

    .brand-lockup__text small {
        display: none;
    }

    .brand-lockup img {
        width: 38px;
        height: 38px;
    }

    .search-trigger {
        min-height: 40px;
        padding: 0 12px;
        font-size: 0.86rem;
    }

    .menu-toggle {
        min-height: 40px;
        padding: 0 12px;
        font-size: 0.86rem;
    }

    .primary-nav {
        left: 16px;
        right: 16px;
    }

    .home-intro__copy h1 {
        font-size: clamp(2.8rem, 14vw, 5rem);
    }

    .entry-rail {
        display: block;
    }

    .entry-rail ol {
        display: block;
    }

    .entry-rail li:nth-child(even) {
        border-left: 0;
    }

    .home-visual-strip__note {
        position: static;
        width: 100%;
        border-radius: 0;
        box-shadow: none;
    }

    .route-ledger__item,
    .article-row,
    .scenario-item,
    .search-result {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .route-ledger__item a,
    .article-row > a {
        grid-column: auto;
    }

    .method-grid {
        grid-template-columns: 1fr;
    }

    .method-grid article {
        min-height: 0;
        border-right: 0;
        border-top: 1px solid var(--line);
    }

    .method-grid article:first-child {
        border-top: 0;
    }

    .article-shelf__grid {
        display: block;
    }

    .article-card + .article-card {
        margin-top: 18px;
    }

    .secondary-topic__visual {
        order: -1;
    }

    .mobile-band__steps {
        grid-template-columns: 1fr;
    }

    .related-reading__grid {
        grid-template-columns: 1fr;
    }

    .status-board {
        grid-template-columns: 1fr;
    }

    .article-index__toolbar,
    .site-footer__bottom {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .home-intro,
    .page-hero {
        padding-top: 36px;
    }

    .page-hero__copy h1,
    .article-detail h1 {
        font-size: clamp(2.2rem, 11vw, 3.6rem);
    }

    .section-heading h2,
    .mobile-band__copy h2,
    .identity-note h2,
    .secondary-topic__copy h2 {
        font-size: clamp(1.9rem, 9vw, 3rem);
    }

    .search-form__row {
        grid-template-columns: 1fr;
    }

    .search-form button {
        width: 100%;
    }

    .page-hero__aside {
        padding-left: 18px;
    }

    .community-group,
    .contact-card {
        padding: 22px;
    }

    .site-footer__grid {
        grid-template-columns: 1fr;
        padding-top: 44px;
    }

    .error-page__grid {
        grid-template-columns: 1fr;
    }

    .error-code {
        font-size: 7rem;
    }
}

@media (max-width: 420px) {
    body {
        font-size: 15px;
    }

    .shell,
    .reading-shell,
    .article-detail__header,
    .article-detail__cover,
    .article-detail__body,
    .related-reading {
        width: min(calc(100% - 24px), var(--shell));
    }

    .brand-lockup__text strong {
        font-size: 0.98rem;
    }

    .brand-lockup {
        gap: 8px;
    }

    .site-header__inner {
        gap: 8px;
    }

    .search-trigger {
        font-size: 0;
        width: 40px;
        padding: 0;
    }

    .search-trigger::before {
        content: "搜";
        font-size: 0.82rem;
    }

    .primary-nav ul {
        grid-template-columns: 1fr;
    }

    .search-modal {
        padding-inline: 12px;
    }

    .search-modal__dialog {
        padding: 26px 20px;
    }

    .search-modal__intro {
        padding-right: 52px;
    }

    .home-visual-strip__frame img {
        height: 260px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}