:root {
    --brand: #2980FE;
    --brand-dark: #145FC4;
    --brand-soft: #EAF3FF;
    --brand-pale: #F6F9FF;
    --surface: #FFFFFF;
    --surface-muted: #F7F9FC;
    --text: #172033;
    --text-body: #465266;
    --text-muted: #758195;
    --border: #DCE6F2;
    --safe: #EAF8F2;
    --warning: #FFF6E8;
    --footer: #0F2747;
    --shadow: 0 18px 48px rgba(25, 67, 120, .10);
    --shadow-soft: 0 10px 28px rgba(25, 67, 120, .08);
    --radius-sm: 14px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text-body);
    background: var(--surface);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
main { min-height: 60vh; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 9999;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--text);
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

.container, .container-wide {
    width: min(calc(100% - 40px), 1120px);
    margin-inline: auto;
}
.container-wide { width: min(calc(100% - 40px), var(--max)); }
.section { padding: 88px 0; }
.section-sm { padding: 64px 0; }
.section-pale { background: var(--brand-pale); }
.section-muted { background: var(--surface-muted); }
.section-safe { background: var(--safe); }
.section-warning { background: var(--warning); }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--brand-dark);
    font-size: .84rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.eyebrow::before {
    content: "";
    width: 26px;
    height: 2px;
    border-radius: 999px;
    background: var(--brand);
}
.section-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, .72fr);
    gap: 56px;
    align-items: end;
    margin-bottom: 38px;
}
.section-heading h2, .content-title h1, .page-hero h1 {
    margin: 0;
    color: var(--text);
    line-height: 1.15;
    letter-spacing: -.035em;
}
.section-heading h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
.section-heading p { margin: 0; font-size: 1.04rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.download-btn, .btn-primary, .btn-secondary, .text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border-radius: 999px;
    font-weight: 800;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.download-btn, .btn-primary {
    padding: 11px 22px;
    color: #fff;
    background: linear-gradient(135deg, var(--brand), var(--brand-dark));
    box-shadow: 0 12px 28px rgba(41, 128, 254, .22);
}
.btn-secondary {
    padding: 10px 21px;
    color: var(--brand-dark);
    background: #fff;
    border: 1px solid var(--border);
}
.text-link {
    min-height: 40px;
    padding: 4px 0;
    color: var(--brand-dark);
    border-radius: 0;
}
.download-btn:hover, .btn-primary:hover, .btn-secondary:hover { transform: translateY(-2px); }
.download-btn:focus-visible, .btn-primary:focus-visible, .btn-secondary:focus-visible, a:focus-visible, button:focus-visible {
    outline: 3px solid rgba(41, 128, 254, .28);
    outline-offset: 3px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(220, 230, 242, .85);
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(18px);
}
.nav-shell {
    position: relative;
    display: grid;
    grid-template-columns: 152px minmax(0, 1fr) auto;
    align-items: center;
    width: min(calc(100% - 32px), 1320px);
    min-height: 76px;
    margin-inline: auto;
    gap: 18px;
}
.brand-link { display: inline-flex; align-items: center; min-height: 48px; }
.brand-logo { width: 132px; max-height: 42px; object-fit: contain; object-position: left center; }
.desktop-nav { display: flex; justify-content: center; align-items: stretch; min-width: 0; gap: 2px; }
.nav-direct, .nav-trigger {
    display: inline-flex;
    align-items: center;
    min-height: 76px;
    padding: 0 11px;
    color: var(--text);
    font-size: .93rem;
    font-weight: 750;
    white-space: nowrap;
}
.nav-direct:hover, .nav-trigger:hover, .nav-direct.is-active, .nav-trigger.is-active { color: var(--brand-dark); }
.nav-direct.is-active, .nav-trigger.is-active { box-shadow: inset 0 -3px 0 var(--brand); }
.chevron { margin-left: 5px; color: var(--text-muted); font-size: .82rem; }
.nav-group { position: relative; }
.mega-menu {
    position: absolute;
    left: 50%;
    top: calc(100% - 2px);
    display: grid;
    grid-template-columns: 280px minmax(420px, 1fr);
    width: min(760px, calc(100vw - 40px));
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 0 0 22px 22px;
    background: rgba(255, 255, 255, .99);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%, 10px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%, 0);
}
.nav-group:nth-last-child(-n+2) .mega-menu { left: auto; right: -110px; transform: translate(0, 10px); }
.nav-group:nth-last-child(-n+2):hover .mega-menu, .nav-group:nth-last-child(-n+2):focus-within .mega-menu { transform: translate(0, 0); }
.mega-intro {
    padding: 22px;
    border-radius: 18px;
    background: linear-gradient(145deg, var(--brand-pale), #fff);
}
.mega-intro h2 { margin: 0 0 8px; color: var(--text); font-size: 1.45rem; }
.mega-intro p { margin: 0 0 16px; color: var(--text-body); font-size: .92rem; }
.mega-intro a { color: var(--brand-dark); font-weight: 800; }
.mega-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding-left: 12px; }
.mega-links a { padding: 13px 14px; border-radius: 14px; }
.mega-links a:hover, .mega-links a:focus-visible { background: var(--surface-muted); }
.mega-links strong, .mega-links span { display: block; }
.mega-links strong { margin-bottom: 2px; color: var(--text); font-size: .96rem; }
.mega-links span { color: var(--text-muted); font-size: .82rem; line-height: 1.45; }
.nav-actions { display: flex; align-items: center; justify-content: flex-end; gap: 9px; }
.nav-download { min-height: 42px; padding: 8px 17px; font-size: .9rem; white-space: nowrap; }
.more-button, .menu-button, .mobile-menu-close {
    min-width: 44px;
    min-height: 44px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    cursor: pointer;
}
.more-button { padding: 0 15px; font-size: .9rem; font-weight: 800; }
.more-panel {
    position: absolute;
    right: 0;
    top: calc(100% - 4px);
    width: 310px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
}
.more-panel a { display: block; padding: 12px; border-radius: 12px; }
.more-panel a:hover { background: var(--surface-muted); }
.more-panel strong, .more-panel span { display: block; }
.more-panel strong { color: var(--text); }
.more-panel span { color: var(--text-muted); font-size: .82rem; }
.mobile-only { display: none; }

.mobile-menu { position: fixed; inset: 0; z-index: 1300; visibility: hidden; pointer-events: none; }
.mobile-menu.is-open { visibility: visible; pointer-events: auto; }
.mobile-menu-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: rgba(15, 39, 71, .42); opacity: 0; transition: opacity .2s ease; }
.mobile-menu-panel {
    position: absolute;
    right: 0;
    top: 0;
    width: min(100%, 520px);
    height: 100%;
    background: #fff;
    transform: translateX(100%);
    transition: transform .24s ease;
    box-shadow: -24px 0 60px rgba(15, 39, 71, .18);
}
.mobile-menu.is-open .mobile-menu-backdrop { opacity: 1; }
.mobile-menu.is-open .mobile-menu-panel { transform: translateX(0); }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; min-height: 72px; padding: 12px 18px; border-bottom: 1px solid var(--border); }
.mobile-menu-close { font-size: 1.6rem; line-height: 1; }
.mobile-menu-scroll { height: calc(100% - 72px); overflow-y: auto; overscroll-behavior: contain; padding: 14px 18px 34px; }
.mobile-home-link { display: flex; align-items: center; min-height: 52px; padding: 0 14px; border-radius: 14px; color: var(--text); background: var(--brand-pale); font-weight: 800; }
.mobile-accordion { border-bottom: 1px solid var(--border); }
.mobile-accordion-trigger { display: flex; align-items: center; justify-content: space-between; width: 100%; min-height: 58px; padding: 0 8px; border: 0; background: transparent; color: var(--text); font-weight: 800; text-align: left; cursor: pointer; }
.mobile-accordion-panel { padding: 0 0 14px; }
.mobile-accordion-panel a { display: block; min-height: 50px; padding: 10px 12px; border-radius: 12px; }
.mobile-accordion-panel a:hover { background: var(--surface-muted); }
.mobile-accordion-panel strong, .mobile-accordion-panel span { display: block; }
.mobile-accordion-panel strong { color: var(--text); }
.mobile-accordion-panel span { color: var(--text-muted); font-size: .82rem; }
.mobile-group-overview { color: var(--brand-dark); font-weight: 800; }
.mobile-quick-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 20px; }
.mobile-quick-links a { display: grid; place-items: center; min-height: 48px; border: 1px solid var(--border); border-radius: 12px; color: var(--text); font-weight: 750; }

.hero {
    position: relative;
    overflow: hidden;
    padding: 76px 0 86px;
    background:
        radial-gradient(circle at 82% 16%, rgba(41, 128, 254, .16), transparent 34%),
        radial-gradient(circle at 12% 86%, rgba(20, 95, 196, .09), transparent 30%),
        linear-gradient(180deg, #fff, var(--brand-pale));
}
.hero::after {
    content: "";
    position: absolute;
    width: 440px;
    height: 440px;
    right: -190px;
    bottom: -240px;
    border: 54px solid rgba(41, 128, 254, .06);
    border-radius: 50%;
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, .82fr); gap: 70px; align-items: center; }
.hero h1 { margin: 0; color: var(--text); font-size: clamp(3rem, 6vw, 5.5rem); line-height: 1.02; letter-spacing: -.055em; }
.hero-lead { max-width: 720px; margin: 24px 0 14px; color: var(--text); font-size: clamp(1.15rem, 2vw, 1.45rem); font-weight: 650; line-height: 1.55; }
.hero-copy { max-width: 720px; margin: 0 0 28px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.hero-links a { color: var(--brand-dark); font-weight: 800; }
.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.hero-device { position: relative; z-index: 2; width: min(100%, 410px); filter: drop-shadow(0 30px 45px rgba(30, 75, 132, .18)); }
.feature-tag { position: absolute; z-index: 3; padding: 10px 16px; border: 1px solid rgba(255,255,255,.9); border-radius: 999px; background: rgba(255, 255, 255, .9); box-shadow: var(--shadow-soft); color: var(--text); font-size: .9rem; font-weight: 800; backdrop-filter: blur(10px); }
.feature-tag.one { top: 70px; left: 0; }
.feature-tag.two { top: 210px; right: 0; }
.feature-tag.three { bottom: 80px; left: 20px; }

.principle-bar { position: relative; z-index: 3; margin-top: -34px; }
.principle-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--border); border-radius: 22px; background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.principle-item { padding: 24px; }
.principle-item + .principle-item { border-left: 1px solid var(--border); }
.principle-item strong { display: block; margin-bottom: 7px; color: var(--text); font-size: 1.06rem; }
.principle-item p { margin: 0; font-size: .9rem; }

.category-grid { display: grid; gap: 18px; }
.category-row-large { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.category-row-tools { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 18px; }
.category-row-wide { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 18px; }
.category-card { position: relative; overflow: hidden; border: 1px solid var(--border); background: #fff; }
.category-card.large { min-height: 245px; padding: 28px; border-radius: 24px; background: linear-gradient(145deg, #fff, var(--brand-pale)); }
.category-card.tool { min-height: 176px; padding: 22px; border-radius: 18px; border-left: 4px solid var(--brand); }
.category-card.wide { min-height: 190px; padding: 24px; border-radius: 22px; background: var(--surface-muted); }
.category-number { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; margin-bottom: 26px; border-radius: 13px; color: var(--brand-dark); background: #fff; box-shadow: var(--shadow-soft); font-weight: 900; }
.category-card h3 { margin: 0 0 9px; color: var(--text); font-size: 1.22rem; }
.category-card p { margin: 0 0 16px; font-size: .92rem; }
.category-card a { color: var(--brand-dark); font-weight: 800; }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); transition: .2s ease; }

.path-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; counter-reset: path; }
.path-step { position: relative; min-height: 220px; padding: 26px; border-radius: 20px; background: #fff; border: 1px solid var(--border); counter-increment: path; }
.path-step::before { content: counter(path, decimal-leading-zero); display: inline-flex; align-items: center; justify-content: center; width: 50px; height: 50px; margin-bottom: 24px; border-radius: 16px; background: var(--brand); color: #fff; font-weight: 900; }
.path-step::after { content: ""; position: absolute; top: 50px; right: -21px; width: 20px; height: 2px; background: var(--border); }
.path-step:nth-child(3)::after, .path-step:nth-child(6)::after { display: none; }
.path-step h3 { margin: 0 0 8px; color: var(--text); }
.path-step p { margin: 0 0 12px; font-size: .92rem; }
.path-step a { color: var(--brand-dark); font-weight: 800; }

.split-layout { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 72px; align-items: center; }
.split-layout.reverse { grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); }
.split-layout.reverse .split-visual { order: 2; }
.split-visual { display: grid; place-items: center; min-height: 460px; padding: 42px; border-radius: 32px; background: linear-gradient(145deg, var(--brand-pale), #fff); border: 1px solid var(--border); }
.split-visual img { max-height: 470px; object-fit: contain; filter: drop-shadow(0 24px 36px rgba(31, 73, 126, .15)); }
.content-title h2 { margin: 0 0 18px; color: var(--text); font-size: clamp(2rem, 4vw, 3.35rem); line-height: 1.15; letter-spacing: -.035em; }
.content-title p { margin: 0 0 18px; }
.check-list, .plain-list { display: grid; gap: 10px; margin: 22px 0; padding: 0; list-style: none; }
.check-list li, .plain-list li { position: relative; padding-left: 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; display: grid; place-items: center; width: 21px; height: 21px; border-radius: 50%; background: var(--safe); color: #16835B; font-size: .78rem; font-weight: 900; }
.plain-list li::before { content: ""; position: absolute; left: 2px; top: .72em; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }

.tool-combo { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; }
.tool-main { min-height: 460px; padding: 38px; border-radius: 28px; background: linear-gradient(145deg, var(--brand), var(--brand-dark)); color: rgba(255,255,255,.88); }
.tool-main h3, .tool-main strong { color: #fff; }
.tool-main h3 { margin: 0 0 15px; font-size: 2rem; }
.tool-main .tool-number { display: inline-flex; margin-bottom: 80px; padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.14); color: #fff; font-weight: 800; }
.tool-main a { color: #fff; font-weight: 900; }
.tool-side { display: grid; gap: 20px; }
.tool-small { min-height: 140px; padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.tool-small h3 { margin: 0 0 8px; color: var(--text); }
.tool-small p { margin: 0 0 10px; font-size: .9rem; }
.tool-small a { color: var(--brand-dark); font-weight: 800; }

.safety-panel { display: grid; grid-template-columns: .75fr 1.25fr; gap: 56px; align-items: start; padding: 54px; border-radius: 32px; background: linear-gradient(145deg, var(--safe), #fff); border: 1px solid #CFEBDD; }
.safety-checks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.safety-checks div { display: flex; align-items: center; min-height: 58px; padding: 12px 15px; border-radius: 14px; background: rgba(255,255,255,.9); border: 1px solid rgba(191, 226, 208, .85); color: var(--text); font-weight: 750; }
.alert-box { margin-top: 22px; padding: 18px 20px; border-radius: 16px; background: var(--warning); border: 1px solid #F6DEB5; color: #744C16; }

.dual-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 26px; }
.topic-card { padding: 30px; border: 1px solid var(--border); border-radius: 22px; background: #fff; }
.topic-card h3 { margin: 0 0 12px; color: var(--text); font-size: 1.35rem; }
.topic-card p { margin: 0 0 14px; }
.topic-card a { color: var(--brand-dark); font-weight: 800; }

.knowledge-band { display: grid; grid-template-columns: .92fr 1.08fr; gap: 48px; padding: 48px; border-radius: 28px; background: var(--footer); color: rgba(255,255,255,.78); }
.knowledge-band h2, .knowledge-band h3 { color: #fff; }
.knowledge-band h2 { margin: 0 0 16px; font-size: clamp(2rem, 4vw, 3.15rem); line-height: 1.15; }
.knowledge-band a { color: #fff; font-weight: 800; }
.knowledge-list { display: grid; gap: 12px; }
.knowledge-list a { display: flex; align-items: center; justify-content: space-between; min-height: 60px; padding: 14px 18px; border-radius: 14px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); }

.platform-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; padding: 48px; border: 1px solid var(--border); border-radius: 28px; background: linear-gradient(135deg, #fff, var(--brand-pale)); }
.integration-steps { display: grid; gap: 14px; counter-reset: integration; }
.integration-steps div { position: relative; padding: 16px 18px 16px 58px; border-radius: 15px; background: #fff; border: 1px solid var(--border); counter-increment: integration; }
.integration-steps div::before { content: counter(integration); position: absolute; left: 16px; top: 15px; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 900; }

.academy-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
.academy-feature { min-height: 420px; padding: 38px; border-radius: 28px; background: linear-gradient(145deg, var(--brand-pale), #fff); border: 1px solid var(--border); }
.academy-feature h3 { margin: 70px 0 14px; color: var(--text); font-size: 2rem; }
.academy-entries { display: grid; gap: 12px; }
.academy-entries a { display: block; padding: 18px 20px; border: 1px solid var(--border); border-radius: 16px; background: #fff; }
.academy-entries strong, .academy-entries span { display: block; }
.academy-entries strong { color: var(--text); }
.academy-entries span { color: var(--text-muted); font-size: .88rem; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { min-height: 210px; padding: 26px; border-radius: 20px; border: 1px solid var(--border); background: #fff; }
.review-card:nth-child(2n) { background: var(--brand-pale); }
.review-card blockquote { margin: 0 0 20px; color: var(--text); font-size: 1rem; }
.review-card span { color: var(--text-muted); font-size: .86rem; font-weight: 750; }

.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 17px; background: #fff; overflow: hidden; }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; min-height: 66px; padding: 15px 20px; color: var(--text); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--brand-dark); font-size: 1.3rem; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-answer { padding: 0 20px 20px; }
.faq-item .faq-answer p { margin: 0; }

.cta-panel { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; padding: 54px; border-radius: 30px; color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-dark)); box-shadow: 0 24px 60px rgba(28, 91, 180, .22); }
.cta-panel h2 { margin: 0 0 10px; color: #fff; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.18; }
.cta-panel p { max-width: 760px; margin: 0; color: rgba(255,255,255,.82); }
.cta-panel .download-btn { background: #fff; color: var(--brand-dark); box-shadow: none; }

.page-hero { padding: 84px 0 72px; background: linear-gradient(180deg, var(--brand-pale), #fff); border-bottom: 1px solid var(--border); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .65fr); gap: 70px; align-items: center; }
.page-hero h1 { font-size: clamp(2.75rem, 6vw, 5rem); }
.page-hero .lead { max-width: 760px; margin: 22px 0 0; color: var(--text); font-size: 1.18rem; }
.page-hero p { max-width: 760px; }
.page-hero-visual { display: grid; place-items: center; min-height: 340px; padding: 28px; border: 1px solid var(--border); border-radius: 28px; background: #fff; }
.page-hero-visual img { max-height: 340px; object-fit: contain; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; color: var(--text-muted); font-size: .88rem; }
.breadcrumb a { color: var(--brand-dark); }

.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 54px; align-items: start; }
.article-content h2 { margin: 42px 0 14px; color: var(--text); font-size: clamp(1.65rem, 3vw, 2.35rem); line-height: 1.25; }
.article-content h2:first-child { margin-top: 0; }
.article-content h3 { margin: 26px 0 10px; color: var(--text); font-size: 1.25rem; }
.article-content p { margin: 0 0 18px; }
.article-content .info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 24px 0; }
.info-card { padding: 24px; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.info-card h3 { margin-top: 0; }
.numbered-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; counter-reset: sectionstep; margin: 24px 0; }
.numbered-card { position: relative; padding: 26px 24px 24px; border-radius: 19px; border: 1px solid var(--border); background: var(--surface-muted); counter-increment: sectionstep; }
.numbered-card::before { content: counter(sectionstep, decimal-leading-zero); display: inline-flex; margin-bottom: 18px; color: var(--brand-dark); font-size: 1.35rem; font-weight: 900; }
.numbered-card h3 { margin-top: 0; }
.notice { margin: 28px 0; padding: 22px 24px; border-radius: 18px; border-left: 4px solid var(--brand); background: var(--brand-pale); }
.notice.warning { border-left-color: #E59B2F; background: var(--warning); }
.notice.safe { border-left-color: #16835B; background: var(--safe); }
.notice strong { display: block; margin-bottom: 5px; color: var(--text); }
.side-nav { position: sticky; top: 104px; display: grid; gap: 16px; }
.side-card { padding: 22px; border: 1px solid var(--border); border-radius: 19px; background: #fff; box-shadow: var(--shadow-soft); }
.side-card h2 { margin: 0 0 12px; color: var(--text); font-size: 1.1rem; }
.side-card a { display: block; min-height: 42px; padding: 8px 0; border-bottom: 1px solid var(--border); color: var(--brand-dark); font-weight: 750; }
.side-card a:last-child { border-bottom: 0; }
.side-card .download-btn { display: inline-flex; width: 100%; margin-top: 8px; color: #fff; }

.support-grid, .service-grid, .topic-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.service-card, .support-card { padding: 26px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.service-card h2, .service-card h3, .support-card h2, .support-card h3 { margin: 0 0 10px; color: var(--text); }
.service-card p, .support-card p { margin: 0 0 14px; }
.service-card a, .support-card a { color: var(--brand-dark); font-weight: 800; }

.site-footer { padding: 70px 0 24px; background: var(--footer); color: rgba(255,255,255,.72); }
.footer-main { display: grid; grid-template-columns: .82fr 1.18fr; gap: 72px; }
.footer-logo { width: 148px; max-height: 50px; object-fit: contain; object-position: left center; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 430px; margin: 20px 0 24px; }
.footer-download { display: inline-flex; }
.footer-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 26px; }
.footer-links h2 { margin: 0 0 14px; color: #fff; font-size: .98rem; }
.footer-links a { display: block; min-height: 36px; color: rgba(255,255,255,.7); font-size: .9rem; }
.footer-links a:hover { color: #fff; }
.footer-risk { display: grid; grid-template-columns: 110px 1fr; gap: 22px; margin-top: 48px; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-risk strong { color: #fff; }
.footer-risk p { margin: 0; font-size: .88rem; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; font-size: .86rem; }
.footer-bottom div { display: flex; gap: 18px; }

@media (max-width: 1180px) {
    .nav-shell { grid-template-columns: 138px minmax(0, 1fr) auto; gap: 8px; }
    .brand-logo { width: 118px; }
    .nav-direct, .nav-trigger { padding-inline: 7px; font-size: .86rem; }
    .more-button { display: none; }
    .nav-group:nth-last-child(-n+2) .mega-menu { right: -70px; }
}

@media (max-width: 980px) {
    .desktop-nav, .desktop-only { display: none; }
    .mobile-only { display: inline-flex; }
    .nav-shell { grid-template-columns: 1fr auto; min-height: 68px; }
    .nav-actions { grid-column: 2; }
    .brand-link { grid-column: 1; grid-row: 1; }
    .menu-button { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; padding: 0; }
    .menu-button span { width: 18px; height: 2px; border-radius: 99px; background: var(--text); }
    .hero-grid, .page-hero-grid, .split-layout, .split-layout.reverse, .content-grid, .footer-main { grid-template-columns: 1fr; }
    .hero { padding-top: 60px; }
    .hero-visual { min-height: 450px; }
    .feature-tag.one { left: 8%; }
    .feature-tag.two { right: 6%; }
    .feature-tag.three { left: 10%; }
    .principle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .principle-item + .principle-item { border-left: 0; }
    .principle-item:nth-child(even) { border-left: 1px solid var(--border); }
    .principle-item:nth-child(n+3) { border-top: 1px solid var(--border); }
    .category-row-large, .category-row-tools, .category-row-wide, .path-grid, .review-grid, .support-grid, .service-grid, .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .path-step:nth-child(3)::after { display: block; }
    .path-step:nth-child(even)::after { display: none; }
    .tool-combo, .safety-panel, .knowledge-band, .platform-panel, .academy-layout { grid-template-columns: 1fr; }
    .section-heading { grid-template-columns: 1fr; gap: 18px; }
    .split-layout.reverse .split-visual { order: 0; }
    .side-nav { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
    .container, .container-wide { width: min(calc(100% - 28px), var(--max)); }
    .section { padding: 64px 0; }
    .section-sm { padding: 48px 0; }
    .nav-shell { width: calc(100% - 20px); }
    .brand-logo { width: 104px; }
    .nav-download { min-height: 40px; padding: 8px 13px; font-size: .82rem; }
    .hero { padding: 48px 0 72px; }
    .hero h1 { font-size: clamp(2.75rem, 14vw, 4.3rem); }
    .hero-grid { gap: 30px; }
    .hero-visual { min-height: 400px; }
    .hero-device { width: min(100%, 330px); }
    .feature-tag { padding: 8px 12px; font-size: .78rem; }
    .feature-tag.one { top: 38px; left: 0; }
    .feature-tag.two { top: 172px; right: 0; }
    .feature-tag.three { bottom: 42px; left: 0; }
    .principle-bar { margin-top: -24px; }
    .principle-grid, .category-row-large, .category-row-tools, .category-row-wide, .path-grid, .dual-cards, .safety-checks, .review-grid, .article-content .info-grid, .numbered-grid, .support-grid, .service-grid, .topic-grid, .side-nav { grid-template-columns: 1fr; }
    .principle-item:nth-child(even) { border-left: 0; }
    .principle-item + .principle-item { border-top: 1px solid var(--border); }
    .category-card.large, .category-card.tool, .category-card.wide { min-height: auto; }
    .path-step { min-height: auto; padding-left: 82px; }
    .path-step::before { position: absolute; left: 20px; top: 24px; }
    .path-step::after { left: 44px; right: auto; top: auto; bottom: -20px; width: 2px; height: 20px; }
    .path-step:nth-child(3)::after, .path-step:nth-child(even)::after { display: block; }
    .path-step:last-child::after { display: none; }
    .split-visual { min-height: 320px; padding: 24px; border-radius: 24px; }
    .tool-main { min-height: 370px; padding: 28px; }
    .tool-main .tool-number { margin-bottom: 46px; }
    .safety-panel, .knowledge-band, .platform-panel, .cta-panel { padding: 30px 24px; border-radius: 22px; }
    .cta-panel { grid-template-columns: 1fr; }
    .page-hero { padding: 58px 0 50px; }
    .page-hero-grid { gap: 30px; }
    .page-hero-visual { min-height: 280px; }
    .footer-main { gap: 42px; }
    .footer-links { grid-template-columns: 1fr 1fr; gap: 26px 18px; }
    .footer-risk { grid-template-columns: 1fr; gap: 8px; }
    .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}