:root {
    --bg: #f3eadf;
    --bg-strong: #e5d4c2;
    --surface: rgba(255, 250, 244, 0.82);
    --surface-strong: rgba(255, 247, 238, 0.94);
    --surface-dark: rgba(18, 28, 28, 0.94);
    --ink: #211d1a;
    --ink-soft: #635851;
    --line: rgba(33, 29, 26, 0.12);
    --accent: #0d8a72;
    --accent-soft: rgba(13, 138, 114, 0.12);
    --accent-strong: rgba(13, 138, 114, 0.22);
    --shadow: 0 30px 80px rgba(49, 34, 16, 0.14);
    --shadow-soft: 0 18px 40px rgba(49, 34, 16, 0.08);
    --radius-xl: 32px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(214, 150, 104, 0.22), transparent 32%),
        radial-gradient(circle at 85% 10%, rgba(13, 138, 114, 0.16), transparent 28%),
        linear-gradient(180deg, #f8f1e7 0%, #efe4d7 54%, #eadfd4 100%);
    font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.33;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.22) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
    background-size: 120px 120px;
}

section[id] {
    scroll-margin-top: 116px;
}

.site-shell {
    position: relative;
    max-width: 1360px;
    margin: 0 auto;
    padding: 28px 28px 48px;
}

.site-header,
.hero-panel,
.detail-card,
.signal-card,
.product-card,
.faq-item,
.timeline-item,
.site-footer {
    backdrop-filter: blur(14px);
}

.site-header {
    position: sticky;
    top: 18px;
    z-index: 24;
    display: grid;
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 24px;
    padding: 18px 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: rgba(255, 250, 244, 0.66);
    box-shadow: var(--shadow);
}

.site-header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.brand-kicker,
.section-label,
.hero-badge,
.visual-eyebrow {
    display: block;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 11px;
    line-height: 1;
    color: var(--ink-soft);
}

.brand-title,
.hero-copy h1,
.section-heading h2,
.detail-card h2,
.visual-name,
.signal-card strong,
.timeline-content h3 {
    font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
}

.brand-title {
    display: inline-flex;
    align-items: flex-end;
    gap: 10px;
    color: var(--ink);
    text-decoration: none;
    font-size: 30px;
    line-height: 1;
}

.brand-title-primary {
    display: block;
    line-height: 1;
}

.brand-title-mini {
    display: inline-flex;
    align-items: center;
    padding-bottom: 3px;
    color: var(--ink-soft);
    font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    opacity: 0.8;
}

body[data-ui-language="en"] .brand-title {
    gap: 0;
}

body[data-ui-language="en"] .brand-title-mini {
    display: none;
}

.brand-language-row {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.brand-locale-note {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid rgba(31, 28, 26, 0.08);
    background: rgba(255, 255, 255, 0.56);
    color: var(--ink-soft);
    font-size: 12px;
    line-height: 1;
}

.site-language-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px;
    border-radius: 999px;
    border: 1px solid rgba(31, 28, 26, 0.08);
    background: rgba(255, 255, 255, 0.56);
    box-shadow: var(--shadow-soft);
}

.site-language-button {
    min-width: 58px;
    min-height: 34px;
    padding: 0 14px;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--ink-soft);
    font: inherit;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.site-language-button:hover {
    transform: translateY(-1px);
}

.site-language-button.is-active {
    background: var(--ink);
    color: #f8f2e9;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 16px;
}

.site-nav a {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1px;
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 14px;
    line-height: 0.98;
}

.nav-label {
    color: var(--ink);
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
}

.nav-label-en {
    font-size: 9px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-top: -1px;
    line-height: 0.98;
}

body[data-ui-language="zh"] .nav-label-en {
    opacity: 0.72;
}

body[data-ui-language="en"] .nav-label {
    display: none;
}

body[data-ui-language="en"] .nav-label-en {
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    color: var(--ink);
}

.site-nav-toggle {
    display: none;
    position: relative;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 1px solid rgba(31, 28, 26, 0.12);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.58);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
}

.site-nav-toggle span {
    position: absolute;
    left: 13px;
    width: 20px;
    height: 2px;
    border-radius: 999px;
    background: var(--ink);
    transition: transform 180ms ease, opacity 180ms ease, top 180ms ease;
}

.site-nav-toggle span:nth-child(1) {
    top: 16px;
}

.site-nav-toggle span:nth-child(2) {
    top: 23px;
}

.site-nav-toggle span:nth-child(3) {
    top: 30px;
}

body.nav-open .site-nav-toggle span:nth-child(1) {
    top: 23px;
    transform: rotate(45deg);
}

body.nav-open .site-nav-toggle span:nth-child(2) {
    opacity: 0;
}

body.nav-open .site-nav-toggle span:nth-child(3) {
    top: 23px;
    transform: rotate(-45deg);
}

.site-main {
    display: grid;
    gap: 26px;
    margin-top: 26px;
}

.mapping-panel {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 18px;
    padding: 30px 34px;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(31, 28, 26, 0.1);
    background:
        linear-gradient(135deg, rgba(20, 33, 32, 0.95) 0%, rgba(15, 106, 88, 0.9) 52%, rgba(247, 239, 226, 0.78) 100%);
    box-shadow: var(--shadow);
    color: #f7f1e8;
}

.mapping-panel::after {
    content: "1:1";
    position: absolute;
    top: -24px;
    right: 22px;
    font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
    font-size: clamp(84px, 14vw, 180px);
    line-height: 0.9;
    color: rgba(255, 255, 255, 0.08);
    pointer-events: none;
}

.mapping-kicker {
    letter-spacing: 0.22em;
    text-transform: uppercase;
    font-size: 11px;
    color: rgba(247, 241, 232, 0.72);
}

.mapping-display {
    position: relative;
    z-index: 1;
    max-width: 14ch;
    font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
    font-size: clamp(44px, 7vw, 76px);
    line-height: 0.96;
}

.mapping-display-en {
    display: block;
    max-width: 15ch;
    margin-top: 16px;
    font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", sans-serif;
    font-size: clamp(16px, 2vw, 24px);
    line-height: 1.28;
    color: rgba(247, 241, 232, 0.78);
}

body[data-ui-language="en"] .mapping-display-en {
    color: rgba(247, 241, 232, 0.94);
}

.mapping-copy {
    position: relative;
    z-index: 1;
    max-width: 78ch;
    margin: 0;
    color: rgba(247, 241, 232, 0.86);
    line-height: 1.8;
    font-size: 15px;
}

.mapping-pill-row {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.mapping-pill {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.08);
    color: #f7f1e8;
    font-size: 13px;
}

.hero-panel {
    display: grid;
    grid-template-columns: 1.2fr 0.95fr;
    gap: 20px;
    padding: 38px;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(31, 28, 26, 0.1);
    background:
        linear-gradient(140deg, rgba(255, 252, 247, 0.92) 0%, rgba(248, 239, 228, 0.78) 48%, rgba(228, 241, 236, 0.88) 100%);
    box-shadow: var(--shadow);
}

.hero-copy h1 {
    margin: 16px 0 12px;
    max-width: 9.5ch;
    font-size: clamp(48px, 8vw, 84px);
    line-height: 0.94;
}

.hero-tagline {
    margin: 0;
    font-size: 21px;
    line-height: 1.45;
    color: #2f2823;
}

.hero-summary {
    margin: 20px 0 0;
    max-width: 62ch;
    color: var(--ink-soft);
    line-height: 1.75;
}

.hero-actions,
.hero-meta,
.visual-resource-links,
.preview-links,
.resource-link-list {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-actions {
    margin-top: 26px;
}

.hero-meta {
    margin-top: 24px;
}

.hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px solid rgba(31, 28, 26, 0.1);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.5);
    color: var(--ink-soft);
    font-size: 13px;
}

.primary-action,
.secondary-action,
.visual-link,
.resource-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 24px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.bilingual-action {
    display: grid;
    gap: 4px;
    text-align: center;
    line-height: 1.05;
}

.bilingual-action small {
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.75;
    font-weight: 600;
}

body[data-ui-language="en"] .bilingual-action > span {
    display: none;
}

body[data-ui-language="en"] .bilingual-action small {
    font-size: 12px;
    color: currentColor;
    opacity: 1;
}

.primary-action {
    color: #fff;
    background: var(--accent);
    box-shadow: 0 16px 36px rgba(13, 138, 114, 0.3);
}

.secondary-action,
.visual-link,
.resource-link {
    color: var(--ink);
    border: 1px solid rgba(31, 28, 26, 0.14);
    background: rgba(255, 255, 255, 0.55);
}

.primary-action:hover,
.secondary-action:hover,
.visual-link:hover,
.resource-link:hover,
.product-card:hover,
.timeline-item:hover {
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
}

.visual-frame {
    width: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    background:
        linear-gradient(180deg, rgba(16, 28, 29, 0.92) 0%, rgba(33, 43, 41, 0.94) 100%);
    color: #f4ede3;
    min-height: 100%;
}

.visual-cover {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(12, 18, 19, 0.16) 0%, rgba(12, 18, 19, 0.78) 100%);
    opacity: 0.42;
    background-size: cover;
    background-position: center;
    transform: scale(1.04);
}

.visual-frame::after {
    content: "";
    position: absolute;
    inset: -30% auto auto -10%;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(255, 152, 92, 0.48), transparent 68%);
    transform: rotate(12deg);
}

.visual-stack {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 18px;
    padding: 28px;
    min-height: 100%;
}

.visual-topline {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

.visual-status {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #ffd7bd;
}

.visual-name {
    font-size: clamp(30px, 5vw, 48px);
    line-height: 1;
    max-width: 8ch;
}

.visual-summary {
    margin: 0;
    max-width: 32ch;
    color: rgba(244, 237, 227, 0.82);
    line-height: 1.7;
}

.visual-resource-links {
    margin-top: 2px;
}

.visual-link {
    min-height: 42px;
    padding: 0 16px;
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: #f4ede3;
    font-size: 13px;
}

.visual-card-grid {
    display: grid;
    gap: 14px;
}

.feature-card {
    padding: 18px 18px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-card h3 {
    margin: 0 0 8px;
    font-size: 20px;
}

.feature-card p {
    margin: 0;
    color: rgba(244, 237, 227, 0.78);
    line-height: 1.6;
}

.feature-metric {
    display: inline-flex;
    margin-bottom: 14px;
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #ffcdac;
}

.signal-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.signal-card {
    display: grid;
    gap: 10px;
    padding: 20px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.signal-card strong {
    font-size: 30px;
    line-height: 1;
}

.signal-card p,
.timeline-content p,
.site-footer p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.7;
}

.detail-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.detail-card,
.product-card,
.faq-item,
.timeline-item,
.site-footer {
    padding: 26px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: 0 16px 42px rgba(49, 34, 16, 0.08);
}

.detail-card h2,
.cadence-section h2 {
    margin: 10px 0 14px;
    font-size: 34px;
    line-height: 1.04;
}

.detail-copy,
.section-heading p,
.faq-answer,
.product-card p {
    color: var(--ink-soft);
    line-height: 1.74;
}

.detail-copy p {
    margin: 0 0 12px;
}

.detail-list {
    margin: 0;
    padding-left: 18px;
    color: var(--ink-soft);
    line-height: 1.85;
}

.resource-card {
    background:
        linear-gradient(180deg, rgba(255, 248, 242, 0.94) 0%, rgba(248, 239, 228, 0.82) 100%);
}

.resource-link-list {
    margin-top: 16px;
}

.resource-link {
    min-height: 46px;
    padding: 0 18px;
}

.cadence-section {
    display: grid;
    gap: 18px;
}

.guide-section {
    display: grid;
    gap: 18px;
}

.guide-card {
    padding: 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background:
        linear-gradient(150deg, rgba(255, 251, 246, 0.94) 0%, rgba(233, 242, 238, 0.86) 100%);
    box-shadow: 0 16px 42px rgba(49, 34, 16, 0.08);
}

.guide-card .detail-copy p:last-child {
    margin-bottom: 0;
}

.guide-notice-board {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid rgba(31, 28, 26, 0.12);
    display: grid;
    gap: 18px;
}

.guide-notice-header {
    display: grid;
    gap: 8px;
    max-width: 74ch;
}

.guide-notice-header h3,
.guide-note h4 {
    margin: 0;
    font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
}

.guide-notice-header h3 {
    font-size: clamp(30px, 4vw, 38px);
    line-height: 1.02;
}

.guide-notice-header p,
.guide-note p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.76;
}

.guide-note-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.guide-note {
    display: grid;
    gap: 10px;
    align-content: start;
    padding: 18px 18px 16px;
    border-radius: 20px;
    border: 1px solid rgba(31, 28, 26, 0.1);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.68) 0%, rgba(241, 248, 244, 0.88) 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.guide-note-label {
    display: inline-flex;
    width: fit-content;
    padding: 7px 11px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--ink);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.guide-note h4 {
    font-size: 22px;
    line-height: 1.08;
}

.walkthrough-section {
    display: grid;
    gap: 18px;
}

.walkthrough-showcase {
    display: grid;
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
    gap: 22px;
    align-items: center;
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(31, 28, 26, 0.12);
    background:
        linear-gradient(145deg, rgba(252, 248, 243, 0.96) 0%, rgba(231, 242, 237, 0.92) 100%);
    box-shadow: 0 20px 46px rgba(49, 34, 16, 0.08);
}

.walkthrough-showcase-copy {
    display: grid;
    gap: 12px;
}

.walkthrough-showcase-copy h3 {
    margin: 0;
    font-size: 34px;
    line-height: 1;
}

.walkthrough-showcase-copy p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.8;
}

.walkthrough-showcase-media {
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid rgba(31, 28, 26, 0.1);
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 42%),
        rgba(255, 255, 255, 0.78);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.walkthrough-showcase-media img {
    display: block;
    width: 100%;
    height: auto;
}

.walkthrough-showcase-media-compact img {
    aspect-ratio: 1280 / 804;
    object-fit: cover;
    object-position: top center;
}

.walkthrough-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.walkthrough-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(31, 28, 26, 0.12);
    background:
        linear-gradient(150deg, rgba(255, 251, 246, 0.94) 0%, rgba(233, 242, 238, 0.86) 100%);
    box-shadow: 0 16px 42px rgba(49, 34, 16, 0.08);
}

.walkthrough-shot {
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid rgba(31, 28, 26, 0.08);
    background:
        linear-gradient(180deg, rgba(17, 31, 30, 0.08) 0%, rgba(17, 31, 30, 0.18) 100%),
        rgba(255, 255, 255, 0.72);
}

.walkthrough-shot img {
    display: block;
    width: 100%;
    height: auto;
}

.walkthrough-step {
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 11px;
    color: var(--accent);
}

.walkthrough-card h3 {
    margin: 0;
    font-size: 30px;
    line-height: 1.08;
}

.walkthrough-card p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.8;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 20px;
}

.section-heading > div {
    display: grid;
    gap: 1px;
    align-content: start;
}

.section-heading h2 {
    margin: 3px 0 0;
    font-size: 42px;
    line-height: 0.97;
}

.section-translation {
    margin: 1px 0 0;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-soft);
    line-height: 1.06;
}

body[data-ui-language="en"] .section-translation {
    color: var(--ink);
}

.section-heading p {
    max-width: 44ch;
    margin: 0;
}

.timeline-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.timeline-item {
    display: grid;
    gap: 16px;
    cursor: pointer;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.timeline-item.is-active {
    border-color: var(--accent-strong);
    box-shadow: 0 22px 50px rgba(13, 138, 114, 0.16);
}

.timeline-date {
    display: inline-flex;
    width: fit-content;
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--ink);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.timeline-content {
    display: grid;
    gap: 8px;
}

.timeline-content h3 {
    margin: 0;
    font-size: 24px;
}

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.timeline-meta span,
.product-chip {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--ink);
    font-size: 12px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.product-card {
    position: relative;
    display: grid;
    gap: 12px;
    cursor: pointer;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
    border-top: 4px solid var(--card-accent, var(--accent));
}

.product-card.is-active {
    transform: translateY(-4px);
    border-color: var(--accent-strong);
    box-shadow: 0 20px 50px rgba(13, 138, 114, 0.16);
}

.product-card.is-empty {
    cursor: default;
}

.product-card h3 {
    margin: 0;
    font-size: 24px;
}

.product-card:hover {
    transform: translateY(-4px);
}

.product-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.faq-list {
    display: grid;
    gap: 12px;
}

.faq-item {
    display: grid;
    gap: 12px;
}

.faq-question {
    all: unset;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.footer-meta {
    display: grid;
    gap: 4px;
    text-align: right;
    color: var(--ink-soft);
}

.footer-record {
    font-size: 13px;
    color: var(--ink-soft);
}

.is-hidden {
    display: none !important;
}

@media (max-width: 1180px) {
    .site-header {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .hero-panel,
    .mapping-panel,
    .detail-layout,
    .walkthrough-showcase {
        grid-template-columns: 1fr;
    }

    .signal-strip,
    .timeline-list,
    .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading,
    .site-footer,
    .visual-topline {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-panel {
        padding: 34px;
    }

    .mapping-display {
        max-width: 11.5ch;
    }

    .mapping-display-en {
        max-width: 20ch;
    }

    .footer-meta {
        text-align: left;
    }
}

@media (max-width: 980px) {
    body.nav-open {
        overflow: hidden;
    }

    .site-header {
        top: 12px;
        gap: 0;
    }

    .site-nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        display: none;
        margin-top: 18px;
        padding-top: 18px;
        border-top: 1px solid rgba(31, 28, 26, 0.1);
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    body.nav-open .site-nav {
        display: flex;
    }

    .site-nav a {
        display: block;
        padding: 12px 14px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.52);
        border: 1px solid rgba(31, 28, 26, 0.08);
        font-size: 15px;
    }

    .brand-language-row {
        gap: 8px;
    }

    .hero-copy h1 {
        max-width: 11ch;
        font-size: clamp(38px, 11vw, 64px);
    }

    .hero-tagline {
        font-size: 18px;
    }

    .signal-strip,
    .walkthrough-grid,
    .guide-note-grid,
    .timeline-list,
    .product-grid {
        grid-template-columns: 1fr;
    }

    .walkthrough-showcase-copy h3 {
        font-size: 28px;
    }

    .walkthrough-card h3 {
        font-size: 26px;
    }
}

@media (max-width: 720px) {
    .site-shell {
        padding: 18px 18px 36px;
    }

    .hero-panel,
    .mapping-panel,
    .detail-card,
    .signal-card,
    .product-card,
    .walkthrough-card,
    .faq-item,
    .timeline-item,
    .site-footer {
        padding: 22px;
    }

    .hero-copy h1,
    .mapping-display,
    .section-heading h2,
    .detail-card h2 {
        max-width: none;
        font-size: 32px;
    }

    .hero-panel,
    .guide-card,
    .walkthrough-showcase {
        padding: 20px;
    }

    .guide-notice-header h3 {
        font-size: 30px;
    }

    .hero-actions,
    .hero-meta,
    .visual-resource-links,
    .resource-link-list {
        gap: 12px;
    }

    .primary-action,
    .secondary-action,
    .visual-link,
    .resource-link {
        width: 100%;
    }

    .visual-summary,
    .hero-summary,
    .mapping-copy,
    .section-heading p {
        max-width: none;
    }

    .walkthrough-showcase-media {
        border-radius: 18px;
    }

    .walkthrough-card h3,
    .timeline-content h3,
    .product-card h3 {
        font-size: 24px;
    }

    .signal-card strong {
        font-size: 26px;
    }
}

@media (max-width: 560px) {
    .site-shell {
        padding: 14px 14px 28px;
    }

    .site-header,
    .hero-panel,
    .mapping-panel,
    .detail-card,
    .guide-card,
    .walkthrough-showcase,
    .walkthrough-card,
    .signal-card,
    .product-card,
    .faq-item,
    .timeline-item,
    .site-footer {
        padding: 18px;
    }

    .brand-title {
        font-size: 24px;
    }

    .brand-language-row {
        width: 100%;
    }

    .brand-locale-note,
    .site-language-toggle {
        width: 100%;
        justify-content: center;
    }

    .site-language-button {
        flex: 1 1 0;
    }

    .mapping-display,
    .section-heading h2,
    .detail-card h2,
    .guide-notice-header h3,
    .walkthrough-showcase-copy h3,
    .walkthrough-card h3 {
        font-size: 28px;
    }

    .section-translation {
        line-height: 1.5;
    }

    .mapping-pill-row {
        gap: 10px;
    }

    .mapping-pill {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .hero-meta span,
    .timeline-meta span,
    .product-chip {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .site-nav a {
        padding: 11px 12px;
    }
}