:root {
    --bg: #F3F7FB;
    --bg-deep: #E6EFF7;
    --surface: #FFFFFF;
    --surface-soft: #DCEBF5;
    --title: #10263A;
    --text: #263B4C;
    --muted: #60788C;
    --subtle: #8094A5;
    --brand: #3B9FE0;
    --brand-light: #67B9EC;
    --brand-deep: #1E6FB8;
    --ice: #B8DDF3;
    --mint: #39A69C;
    --border: rgba(30,111,184,0.16);
    --border-strong: rgba(59,159,224,0.38);
    --shadow: 0 14px 36px rgba(16,38,58,0.08);
    --radius: 14px;
    --radius-sm: 10px;
    --topbar: 72px;
    --content-max: 1240px;
    --rail-width: 220px;
}

* {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    min-width: 0;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 0%, rgba(103,185,236,0.11), transparent 30rem),
        linear-gradient(180deg, #F7FAFD 0%, var(--bg) 30%, #EEF5FA 100%);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.78;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body.ui-locked {
    overflow: hidden;
}

a {
    color: var(--brand-deep);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
}

a:hover {
    color: #15588F;
}

button,
input {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(59,159,224,0.32);
    outline-offset: 3px;
}

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

h1,
h2,
h3,
h4,
p {
    margin-top: 0;
}

h1,
h2,
h3,
h4 {
    color: var(--title);
    line-height: 1.3;
}

h1 {
    margin-bottom: 20px;
    font-size: clamp(30px, 4vw, 38px);
    letter-spacing: -0.02em;
}

h2 {
    margin-bottom: 14px;
    font-size: clamp(22px, 3vw, 28px);
}

h3 {
    margin-bottom: 10px;
    font-size: 20px;
}

p,
li {
    overflow-wrap: anywhere;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: 10px;
    left: 10px;
    transform: translateY(-140%);
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--title);
    color: #fff;
    text-decoration: none;
}

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

.topbar {
    position: sticky;
    z-index: 120;
    top: 0;
    min-height: var(--topbar);
    border-bottom: 1px solid var(--border);
    background: rgba(247,250,253,0.92);
    box-shadow: 0 6px 18px rgba(16,38,58,0.05);
    backdrop-filter: blur(16px);
}

.topbar-inner {
    width: min(calc(100% - 32px), var(--content-max));
    min-height: var(--topbar);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand-link,
.footer-brand {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 14px;
    color: var(--title);
    text-decoration: none;
}

.brand-logo-image {
    width: auto;
    height: clamp(28px, 3vw, 34px);
    max-width: 190px;
    object-fit: contain;
    object-position: left center;
}

.brand-logo-text {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--title);
    white-space: nowrap;
}

.brand-state {
    padding-left: 14px;
    border-left: 1px solid var(--border);
    color: var(--muted);
    font-size: 14px;
    white-space: nowrap;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-action,
.rail-all,
.panel-close {
    min-height: 44px;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    background: #fff;
    color: var(--brand-deep);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.top-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 66px;
    padding: 8px 14px;
    font-size: 15px;
}

.top-action:hover,
.rail-all:hover,
.panel-close:hover {
    border-color: var(--brand-deep);
    background: #F5FBFF;
    color: var(--brand-deep);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(30,111,184,0.08);
}

.menu-trigger {
    background: linear-gradient(135deg, var(--brand-light) 0%, var(--brand) 52%, var(--brand-deep) 100%);
    color: #fff;
    border-color: transparent;
}

.menu-trigger:hover {
    color: #fff;
    background: linear-gradient(135deg, #5EB2E8 0%, #3296D9 52%, #1C67A9 100%);
}

.site-shell {
    width: min(calc(100% - 32px), var(--content-max));
    margin: 0 auto;
    display: grid;
    grid-template-columns: var(--rail-width) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
}

.desktop-rail {
    min-width: 0;
    padding-top: 34px;
}

.rail-card {
    position: sticky;
    top: calc(var(--topbar) + 22px);
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.82);
    box-shadow: 0 12px 30px rgba(16,38,58,0.05);
    backdrop-filter: blur(12px);
}

.rail-group + .rail-group {
    margin-top: 22px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.rail-group h2 {
    margin-bottom: 4px;
    font-size: 16px;
}

.rail-group p {
    margin-bottom: 10px;
    color: var(--subtle);
    font-size: 12px;
    line-height: 1.6;
}

.rail-group nav {
    display: grid;
    gap: 4px;
}

.rail-link {
    display: flex;
    min-height: 36px;
    align-items: center;
    padding: 7px 10px;
    border-left: 3px solid transparent;
    border-radius: 0 8px 8px 0;
    color: var(--text);
    font-size: 14px;
    text-decoration: none;
}

.rail-link:hover {
    background: #F5FAFE;
}

.rail-link.is-current {
    border-left-color: var(--brand-deep);
    background: #E6F3FB;
    color: var(--title);
    font-weight: 700;
}

.rail-all {
    width: 100%;
    margin-top: 18px;
    padding: 8px 12px;
    font-size: 14px;
}

.page-content {
    min-width: 0;
    padding: 34px 0 72px;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 18px;
    color: var(--subtle);
    font-size: 14px;
}

.breadcrumbs a {
    color: var(--muted);
}

.breadcrumbs span + span::before,
.breadcrumbs a + span::before,
.breadcrumbs a + a::before {
    content: "/";
    margin-right: 7px;
    color: #9CB0BF;
}

.page-hero,
.article-hero {
    margin-bottom: 34px;
    padding: clamp(24px, 4vw, 42px);
    border: 1px solid var(--border);
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(184,221,243,0.52), rgba(255,255,255,0.96) 48%, rgba(220,235,245,0.72));
    box-shadow: var(--shadow);
}

.page-kicker,
.section-kicker {
    margin-bottom: 8px;
    color: var(--brand-deep);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.page-lead {
    max-width: 850px;
    margin-bottom: 0;
    color: var(--muted);
    font-size: clamp(17px, 2vw, 19px);
    line-height: 1.85;
}

.section-block {
    margin-top: 46px;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 20px;
}

.section-heading p {
    max-width: 640px;
    margin-bottom: 0;
    color: var(--muted);
    font-size: 15px;
}

.copy-grid,
.two-col,
.three-col,
.four-col {
    display: grid;
    gap: 18px;
}

.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-col {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.four-col {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.copy-card,
.info-card,
.note-card,
.link-card,
.process-card,
.summary-card,
.faq-intro,
.action-zone,
.task-card,
.short-card,
.check-card,
.policy-card,
.index-card,
.topic-block {
    min-width: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 8px 24px rgba(16,38,58,0.045);
}

.copy-card,
.info-card,
.note-card,
.process-card,
.summary-card,
.faq-intro,
.action-zone,
.check-card,
.policy-card,
.topic-block {
    padding: 22px;
}

.copy-card p:last-child,
.info-card p:last-child,
.note-card p:last-child,
.process-card p:last-child,
.summary-card p:last-child,
.check-card p:last-child,
.policy-card p:last-child,
.topic-block p:last-child {
    margin-bottom: 0;
}

.soft-card {
    background: #F8FBFD;
}

.tint-card {
    background: #EAF5FB;
}

.mint-card {
    background: #EDF9F7;
}

.dark-card {
    background: linear-gradient(145deg, #164D77, #1E6FB8);
    color: #fff;
}

.dark-card h2,
.dark-card h3,
.dark-card a,
.dark-card p,
.dark-card li {
    color: #fff;
}

.card-number {
    display: inline-flex;
    width: 42px;
    height: 42px;
    margin-bottom: 16px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: #E1F1FB;
    color: var(--brand-deep);
    font-size: 16px;
    font-weight: 800;
}

.primary-btn,
.secondary-btn,
.text-link {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
}

.primary-btn {
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--brand-light) 0%, var(--brand) 52%, var(--brand-deep) 100%);
    color: #fff;
    box-shadow: 0 10px 22px rgba(30,111,184,0.18);
}

.primary-btn:hover {
    color: #fff;
    transform: translateY(-1px);
}

.secondary-btn {
    padding: 10px 18px;
    border: 1px solid var(--border-strong);
    background: #fff;
    color: var(--brand-deep);
}

.text-link {
    min-height: 36px;
    justify-content: flex-start;
    color: var(--brand-deep);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.tag-list span {
    display: inline-flex;
    min-height: 30px;
    align-items: center;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #F7FBFE;
    color: var(--muted);
    font-size: 13px;
}

.media-frame {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(145deg, #EAF3F9, #F8FBFD);
}

.media-frame img {
    width: 100%;
    height: auto;
    max-height: 360px;
    object-fit: contain;
    object-position: center;
    background: #EFF6FA;
}

.media-fallback {
    display: grid;
    min-height: 220px;
    place-items: center;
    padding: 24px;
    color: var(--brand-deep);
    background:
        linear-gradient(145deg, rgba(184,221,243,0.58), rgba(255,255,255,0.92)),
        repeating-linear-gradient(90deg, transparent 0 42px, rgba(30,111,184,0.05) 42px 43px);
}

.media-fallback span {
    max-width: 70%;
    text-align: center;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.banner-media img {
    max-height: 420px;
}

.banner-media.media-fallback {
    min-height: 280px;
}

.landscape-media img {
    max-height: 300px;
}

.landscape-media.media-fallback {
    min-height: 210px;
}

.square-media {
    aspect-ratio: 1 / 1;
}

.square-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.square-media.media-fallback {
    min-height: auto;
}

.app-media {
    width: min(100%, 360px);
    margin-inline: auto;
    aspect-ratio: 3 / 4;
}

.app-media img {
    width: 100%;
    height: 100%;
    max-height: 460px;
    object-fit: contain;
}

.app-media.media-fallback {
    min-height: 360px;
}

.brand-cover {
    display: grid;
    gap: 22px;
}

.brand-cover-copy {
    padding: 4px 4px 0;
}

.home-intro {
    max-width: 840px;
    color: var(--muted);
    font-size: 18px;
}

.task-band {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.task-card {
    overflow: hidden;
}

.task-card-copy {
    padding: 18px;
}

.task-card h3 {
    font-size: 18px;
}

.task-card p {
    color: var(--muted);
    font-size: 14px;
}

.task-card .media-frame {
    border: 0;
    border-radius: 0;
    border-bottom: 1px solid var(--border);
}

.task-card .media-frame img {
    max-height: 160px;
}

.task-card .media-fallback {
    min-height: 140px;
}

.glance-board {
    display: grid;
    grid-template-columns: 1.5fr 0.85fr;
    gap: 18px;
}

.glance-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, .8fr);
    gap: 20px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.glance-main .media-frame img {
    max-height: 280px;
}

.glance-side {
    display: grid;
    gap: 18px;
}

.short-card {
    padding: 20px;
}

.channel-strip {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
    gap: 28px;
    align-items: center;
    padding: 22px;
    border-top: 1px solid var(--border);
}

.channel-strip:last-child {
    border-bottom: 1px solid var(--border);
}

.channel-strip.is-reverse .media-frame {
    order: 2;
}

.channel-strip.is-reverse .channel-copy {
    order: 1;
}

.people-feature {
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(0, 1fr);
    gap: 26px;
}

.people-nodes {
    display: grid;
    gap: 12px;
}

.people-node {
    padding: 18px;
    border-left: 4px solid var(--brand);
    border-radius: 0 12px 12px 0;
    background: #fff;
    box-shadow: 0 8px 20px rgba(16,38,58,.045);
}

.topic-mosaic {
    display: grid;
    grid-template-columns: 1.25fr 0.85fr 1fr;
    grid-auto-rows: minmax(140px, auto);
    gap: 14px;
}

.topic-tile {
    position: relative;
    overflow: hidden;
    min-height: 150px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.topic-tile:nth-child(1),
.topic-tile:nth-child(5) {
    grid-row: span 2;
}

.topic-tile:nth-child(2),
.topic-tile:nth-child(6) {
    background: #E9F5FB;
}

.topic-tile:nth-child(3) {
    background: #EEF9F7;
}

.topic-tile:nth-child(4) {
    background: #E6EFF7;
}

.topic-tile .topic-no {
    display: block;
    margin-bottom: 22px;
    color: var(--brand-deep);
    font-size: 13px;
    font-weight: 800;
}

.collection-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 24px;
}

.shelf-structure {
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.shelf-row {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px dashed var(--border-strong);
}

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

.shelf-row strong {
    color: var(--brand-deep);
}

.rank-list {
    display: grid;
    gap: 10px;
}

.rank-item {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

.rank-item:last-child {
    border-bottom: 0;
}

.rank-item b {
    color: var(--brand-deep);
    font-size: 22px;
}

.lab-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.lab-option {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: start;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.switch-label {
    position: relative;
    display: inline-flex;
    width: 52px;
    height: 30px;
    align-items: center;
}

.switch-label input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.switch-ui {
    position: absolute;
    inset: 0;
    border: 1px solid var(--border-strong);
    border-radius: 9px;
    background: #E8F0F6;
    cursor: pointer;
}

.switch-ui::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 4px;
    width: 20px;
    height: 20px;
    border-radius: 6px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(16,38,58,.16);
    transition: transform 160ms ease;
}

.switch-label input:checked + .switch-ui {
    background: var(--brand);
}

.switch-label input:checked + .switch-ui::after {
    transform: translateX(22px);
}

.demo-surface {
    margin-top: 18px;
    padding: 18px;
    border: 1px dashed var(--border-strong);
    border-radius: 12px;
    background: #F8FBFD;
    transition: font-size 160ms ease, line-height 160ms ease, background 160ms ease;
}

.demo-surface.demo-active {
    background: #E7F4FB;
    font-size: 18px;
    line-height: 2;
}

.mobile-showcase {
    display: grid;
    grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
    gap: 36px;
    align-items: center;
}

.app-icon-wrap {
    display: inline-grid;
    width: 72px;
    height: 72px;
    margin-bottom: 18px;
    place-items: center;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 8px 24px rgba(16,38,58,.08);
}

.app-icon-wrap .media-frame {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: 0;
}

.app-icon-wrap .media-fallback {
    min-height: 100%;
    padding: 4px;
}

.boundary-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.boundary-list .policy-card:last-child {
    grid-column: 1 / -1;
}

/* Inner page patterns */
.step-board {
    counter-reset: steps;
    display: grid;
    gap: 16px;
}

.step-row {
    counter-increment: steps;
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 18px;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.step-row::before {
    content: counter(steps, decimal-leading-zero);
    display: grid;
    width: 52px;
    height: 52px;
    place-items: center;
    border-radius: 12px;
    background: #E5F3FB;
    color: var(--brand-deep);
    font-weight: 800;
}

.editor-board {
    display: grid;
    grid-template-columns: 1.4fr .9fr;
    gap: 18px;
}

.editor-main,
.editor-side {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.editor-main {
    padding: 26px;
}

.editor-side {
    display: grid;
    gap: 0;
}

.editor-side article {
    padding: 18px;
    border-bottom: 1px solid var(--border);
}

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

.profile-index {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.profile-index .index-card {
    padding: 22px;
}

.keyword-line {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0 0;
}

.keyword-line span {
    padding: 6px 10px;
    border-left: 3px solid var(--brand);
    background: #F5FAFD;
    color: var(--muted);
    font-size: 14px;
}

.film-bands {
    display: grid;
    gap: 16px;
}

.film-band {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 24px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.film-band .genre {
    align-self: stretch;
    display: grid;
    place-items: center;
    min-height: 120px;
    padding: 16px;
    border-radius: 12px;
    background: #EAF5FB;
    color: var(--brand-deep);
    font-size: 20px;
    font-weight: 800;
    text-align: center;
}

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

.clip-entry {
    padding: 20px;
    border-left: 4px solid var(--brand-light);
    border-radius: 0 12px 12px 0;
    background: #fff;
    box-shadow: 0 8px 20px rgba(16,38,58,.045);
}

.serial-book {
    display: grid;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
}

.serial-chapter {
    display: grid;
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 20px;
    padding: 22px;
    border-bottom: 1px solid var(--border);
}

.serial-chapter:last-child {
    border-bottom: 0;
}

.serial-chapter .chapter-no {
    color: var(--brand-deep);
    font-size: 14px;
    font-weight: 800;
}

.process-flow {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 10px;
}

.process-flow .process-card {
    padding: 16px;
}

.process-flow .process-card span {
    display: block;
    margin-bottom: 18px;
    color: var(--brand-deep);
    font-size: 12px;
    font-weight: 800;
}

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

.magazine-grid .topic-block:nth-child(1),
.magazine-grid .topic-block:nth-child(5) {
    grid-column: span 2;
}

.shelf-layers {
    display: grid;
    gap: 12px;
}

.shelf-layer {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 20px;
    border-bottom: 5px solid #C9DCE9;
    border-radius: 12px 12px 4px 4px;
    background: #fff;
    box-shadow: 0 8px 18px rgba(16,38,58,.04);
}

.numbered-list {
    display: grid;
    gap: 16px;
}

.numbered-item {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 20px;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.numbered-item .num {
    color: var(--brand-deep);
    font-size: 28px;
    font-weight: 800;
}

.kanban {
    display: grid;
    grid-template-columns: repeat(5, minmax(180px, 1fr));
    gap: 12px;
    overflow: visible;
}

.kanban-column {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #F9FCFE;
}

.kanban-column h2 {
    font-size: 17px;
}

.kanban-note {
    margin-top: 12px;
    padding: 14px;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 6px 16px rgba(16,38,58,.04);
    font-size: 14px;
}

.tool-workbench {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.tool-panel {
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.long-note article {
    max-width: 820px;
}

.long-note article section {
    margin-top: 34px;
}

.editor-observation {
    margin: 30px 0;
    padding: 22px 24px;
    border-left: 5px solid var(--mint);
    background: #EDF9F7;
    color: #28544F;
}

.theme-map {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.map-stop {
    position: relative;
    min-height: 170px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.map-stop::after {
    content: "";
    position: absolute;
    top: 38px;
    right: -19px;
    width: 19px;
    border-top: 2px dashed var(--border-strong);
}

.map-stop:last-child::after {
    display: none;
}

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

.install-checklist {
    display: grid;
    gap: 14px;
}

.check-row {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.check-row .checkmark {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 10px;
    background: #EAF7F4;
    color: var(--mint);
    font-weight: 900;
}

.policy-groups {
    display: grid;
    gap: 16px;
}

.policy-group {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.policy-group header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 20px;
    align-items: start;
    margin-bottom: 16px;
}

.policy-summary {
    padding: 14px;
    border-radius: 10px;
    background: #EAF5FB;
    color: var(--brand-deep);
    font-size: 14px;
}

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

.help-card {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

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

.faq-list details {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
}

.faq-list summary {
    display: flex;
    min-height: 56px;
    align-items: center;
    padding: 16px 20px;
    color: var(--title);
    font-weight: 800;
    cursor: pointer;
}

.faq-list details[open] summary {
    border-bottom: 1px solid var(--border);
    background: #F5FAFD;
}

.faq-answer {
    padding: 18px 20px 20px;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.contact-types {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.contact-type {
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.principle-chapters {
    display: grid;
    gap: 18px;
}

.principle-chapter {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 24px;
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.principle-chapter:first-child {
    border-top: 0;
}

.principle-chapter .chapter-label {
    color: var(--brand-deep);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .08em;
}

.related-links {
    margin-top: 42px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.link-card {
    display: block;
    min-height: 128px;
    padding: 18px;
    color: var(--text);
    text-decoration: none;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.link-card:hover {
    border-color: var(--border-strong);
    color: var(--text);
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(16,38,58,.08);
}

.link-card strong {
    display: block;
    margin-bottom: 8px;
    color: var(--title);
}

.link-card span {
    color: var(--muted);
    font-size: 14px;
}

.action-zone {
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: linear-gradient(135deg, #E7F3FA, #FFFFFF);
}

.action-zone p {
    max-width: 650px;
    margin-bottom: 0;
    color: var(--muted);
}

/* Footer */
.site-footer {
    background: linear-gradient(145deg, #154C75, #1B5E90 52%, #184E77);
    color: #E8F3FA;
}

.footer-inner {
    width: min(calc(100% - 32px), var(--content-max));
    margin: 0 auto;
    padding: 42px 0 28px;
}

.footer-brand-row {
    display: grid;
    grid-template-columns: minmax(220px, .7fr) minmax(0, 1.3fr);
    gap: 32px;
    align-items: start;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255,255,255,.16);
}

.footer-brand {
    color: #fff;
}

.footer-brand:hover {
    color: #fff;
}

.footer-brand .brand-logo-image {
    max-width: 150px;
    filter: brightness(0) invert(1);
}

.footer-brand .brand-logo-text {
    color: #fff;
}

.footer-brand span:not(.brand-logo-text) {
    display: grid;
    line-height: 1.25;
}

.footer-brand small {
    margin-top: 4px;
    color: #BFD9EA;
}

.footer-brand-row p {
    margin: 0;
    color: #D6E7F2;
    font-size: 14px;
}

.footer-groups {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1fr 1.6fr;
    gap: 28px;
    padding: 30px 0;
}

.footer-groups h2 {
    margin-bottom: 10px;
    color: #fff;
    font-size: 16px;
}

.footer-groups nav {
    display: grid;
    gap: 6px;
}

.footer-groups a {
    color: #DCEAF4;
    font-size: 14px;
    text-decoration: none;
}

.footer-groups a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,.12);
    color: #BFD4E2;
    font-size: 13px;
}

/* Overlay and dialogs */
.ui-overlay {
    position: fixed;
    z-index: 280;
    inset: 0;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    background: rgba(10,33,50,.46);
    backdrop-filter: blur(3px);
    transition: opacity 180ms ease, visibility 180ms ease;
}

.ui-overlay.is-visible {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

.site-menu-panel,
.search-dialog {
    position: fixed;
    z-index: 300;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.site-menu-panel {
    left: 50%;
    bottom: 18px;
    width: min(calc(100% - 36px), 980px);
    max-height: 82vh;
    transform: translate(-50%, 22px);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.75);
    border-radius: 18px;
    background: #F8FBFD;
    box-shadow: 0 28px 80px rgba(8,31,48,.28);
}

.site-menu-panel.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

.menu-panel-inner {
    max-height: 82vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.panel-header {
    position: sticky;
    z-index: 2;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(248,251,253,.96);
    backdrop-filter: blur(10px);
}

.panel-header.compact {
    position: static;
    padding: 0 0 18px;
    background: transparent;
}

.panel-title-group {
    display: flex;
    align-items: center;
    gap: 14px;
}

.panel-logo .brand-logo-image {
    max-width: 120px;
    height: 30px;
}

.panel-logo .brand-logo-text {
    font-size: 18px;
}

.panel-header p {
    margin: 0 0 2px;
    color: var(--subtle);
    font-size: 11px;
    letter-spacing: .08em;
}

.panel-header h2 {
    margin: 0;
    font-size: 20px;
}

.panel-close {
    flex: 0 0 auto;
    padding: 8px 14px;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding: 20px;
}

.menu-group h3 {
    margin: 0 0 8px;
    color: var(--brand-deep);
    font-size: 14px;
}

.menu-group a {
    display: block;
    margin-bottom: 6px;
    padding: 10px;
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
}

.menu-group a:hover,
.menu-group a.is-current {
    border-color: var(--border);
    background: #fff;
}

.menu-group strong,
.menu-group span {
    display: block;
}

.menu-group strong {
    color: var(--title);
    font-size: 14px;
}

.menu-group span {
    margin-top: 3px;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.5;
}

.search-dialog {
    top: 50%;
    left: 50%;
    width: min(calc(100% - 32px), 640px);
    transform: translate(-50%, -46%) scale(.985);
}

.search-dialog.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.search-box {
    max-height: min(78vh, 700px);
    overflow-y: auto;
    padding: 24px;
    border: 1px solid rgba(255,255,255,.8);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 28px 80px rgba(8,31,48,.28);
}

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

.search-field {
    width: 100%;
    min-height: 50px;
    padding: 10px 14px;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    color: var(--title);
    background: #FAFCFE;
}

.search-help {
    margin: 8px 0 14px;
    color: var(--subtle);
    font-size: 13px;
}

.search-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.search-results a {
    display: block;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
}

.search-results a:hover {
    background: #F5FAFD;
}

.search-results strong,
.search-results span {
    display: block;
}

.search-results strong {
    color: var(--title);
}

.search-results span {
    margin-top: 2px;
    color: var(--muted);
    font-size: 12px;
}

.search-empty {
    margin: 16px 0 0;
    padding: 14px;
    border-radius: 10px;
    background: #EEF5FA;
    color: var(--muted);
    text-align: center;
}

.mobile-bottom-nav {
    display: none;
}

@media (max-width: 1180px) {
    .site-shell {
        gap: 24px;
        grid-template-columns: 210px minmax(0, 1fr);
    }
    .task-band {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .process-flow {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .kanban {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 960px) {
    .site-shell {
        grid-template-columns: 1fr;
    }
    .desktop-rail {
        display: none;
    }
    .page-content {
        padding-top: 26px;
    }
    .menu-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .glance-board,
    .editor-board,
    .people-feature,
    .collection-grid,
    .mobile-showcase {
        grid-template-columns: 1fr;
    }
    .glance-main {
        grid-template-columns: 1fr;
    }
    .topic-mosaic {
        grid-template-columns: 1fr 1fr;
    }
    .topic-tile:nth-child(n) {
        grid-row: auto;
    }
    .three-col,
    .four-col,
    .app-feature-grid,
    .help-directory {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .process-flow {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .theme-map {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .map-stop:nth-child(2n)::after {
        display: none;
    }
}

@media (max-width: 760px) {
    :root {
        --topbar: 66px;
    }
    body {
        font-size: 16px;
        padding-bottom: calc(58px + env(safe-area-inset-bottom));
    }
    .topbar-inner,
    .site-shell,
    .footer-inner {
        width: calc(100% - 32px);
    }
    .brand-state,
    .top-app-link {
        display: none;
    }
    .brand-logo-image {
        max-width: 132px;
        height: 30px;
    }
    .brand-logo-text {
        font-size: 19px;
    }
    .topbar-actions {
        gap: 6px;
    }
    .top-action {
        min-width: 56px;
        padding-inline: 10px;
        font-size: 14px;
    }
    .page-content {
        padding: 22px 0 50px;
    }
    .page-hero,
    .article-hero {
        padding: 24px 20px;
        margin-bottom: 26px;
    }
    .section-block {
        margin-top: 38px;
    }
    .section-heading {
        align-items: start;
        flex-direction: column;
        gap: 8px;
    }
    .two-col,
    .three-col,
    .four-col,
    .task-band,
    .lab-grid,
    .profile-index,
    .clip-directory,
    .tool-workbench,
    .contact-types,
    .app-feature-grid,
    .help-directory,
    .related-grid,
    .boundary-list,
    .magazine-grid {
        grid-template-columns: 1fr;
    }
    .boundary-list .policy-card:last-child {
        grid-column: auto;
    }
    .glance-board,
    .glance-main,
    .people-feature,
    .collection-grid,
    .mobile-showcase {
        gap: 14px;
    }
    .channel-strip {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 18px 0;
    }
    .channel-strip.is-reverse .media-frame,
    .channel-strip.is-reverse .channel-copy {
        order: initial;
    }
    .channel-strip .media-frame {
        order: 1 !important;
    }
    .channel-strip .channel-copy {
        order: 2 !important;
    }
    .topic-mosaic {
        grid-template-columns: 1fr;
    }
    .shelf-row,
    .shelf-layer,
    .numbered-item,
    .serial-chapter,
    .step-row,
    .principle-chapter,
    .film-band,
    .check-row {
        grid-template-columns: 1fr;
    }
    .film-band .genre {
        min-height: 80px;
    }
    .process-flow {
        grid-template-columns: 1fr;
    }
    .kanban {
        grid-template-columns: 1fr;
    }
    .theme-map {
        grid-template-columns: 1fr;
    }
    .map-stop::after {
        display: none;
    }
    .policy-group header {
        grid-template-columns: 1fr;
    }
    .action-zone {
        align-items: stretch;
        flex-direction: column;
    }
    .footer-brand-row,
    .footer-groups {
        grid-template-columns: 1fr 1fr;
    }
    .footer-brand-row {
        gap: 18px;
    }
    .footer-brand-row p {
        grid-column: 1 / -1;
    }
    .footer-groups {
        gap: 24px 18px;
    }
    .site-menu-panel {
        bottom: 0;
        width: 100%;
        max-height: 82vh;
        border-radius: 18px 18px 0 0;
        border-bottom: 0;
    }
    .menu-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px;
    }
    .menu-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }
    .menu-group h3 {
        grid-column: 1 / -1;
    }
    .menu-group a {
        margin: 0;
    }
    .menu-group span {
        font-size: 10px;
    }
    .search-box {
        padding: 20px;
    }
    .search-results {
        grid-template-columns: 1fr;
    }
    .mobile-bottom-nav {
        position: fixed;
        z-index: 180;
        right: 0;
        bottom: 0;
        left: 0;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        min-height: calc(58px + env(safe-area-inset-bottom));
        padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
        border-top: 1px solid var(--border);
        background: rgba(248,251,253,.97);
        box-shadow: 0 -8px 24px rgba(16,38,58,.08);
        backdrop-filter: blur(12px);
    }
    .mobile-bottom-nav a {
        display: flex;
        min-width: 0;
        min-height: 44px;
        align-items: center;
        justify-content: center;
        padding: 4px 5px;
        border-radius: 9px;
        color: var(--muted);
        font-size: 12px;
        font-weight: 700;
        text-decoration: none;
        white-space: nowrap;
    }
    .mobile-bottom-nav a.is-current {
        background: var(--brand-deep);
        color: #fff;
    }
    .ui-overlay {
        z-index: 280;
    }
    .site-menu-panel,
    .search-dialog {
        z-index: 300;
    }
    .media-frame img {
        width: 100%;
        height: auto;
        max-height: none;
    }
    .app-media {
        width: min(100%, 330px);
        height: auto;
        aspect-ratio: auto;
    }
    .app-media img {
        width: 100%;
        height: auto;
        max-height: 460px;
    }
}

@media (max-width: 430px) {
    .topbar-inner,
    .site-shell,
    .footer-inner {
        width: calc(100% - 32px);
    }
    .footer-groups {
        grid-template-columns: 1fr;
    }
    .menu-group {
        grid-template-columns: 1fr;
    }
    .page-hero,
    .article-hero,
    .copy-card,
    .info-card,
    .note-card,
    .process-card,
    .summary-card,
    .action-zone,
    .policy-group,
    .tool-panel {
        padding: 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

[hidden] {
    display: none !important;
}

main,
section[id],
h1[id],
h2[id] {
    scroll-margin-top: calc(var(--topbar) + 16px);
}