:root {
    --ivory: #faf9f6;
    --paper: #ffffff;
    --navy: #16253d;
    --navy-deep: #0e1a2e;
    --ink: #1c2635;
    --body-c: #4d5766;
    --mute: #8a8f98;
    --hair: #e6e3da;
    --hair-dark: #d8d4c8;
    --bronze: #9c7c4a;
    --bronze-deep: #7f6238;
    --ok: #2f6b4f;
    --err: #a3423a;
    --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
    --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { max-width: 100%; overflow-x: hidden; }

body {
    font-family: var(--sans);
    background: var(--ivory);
    color: var(--ink);
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    padding-top: 113px;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--navy); color: var(--ivory); }
:focus-visible { outline: 2px solid var(--bronze); outline-offset: 3px; }

h1, h2, h3 { text-wrap: balance; }

.shell { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 30px;
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn-navy { background: var(--navy); color: #f6f4ee; }
.btn-navy:hover { background: var(--navy-deep); }
.btn-quiet { border-color: var(--hair-dark); color: var(--ink); background: transparent; }
.btn-quiet:hover { border-color: var(--navy); }
.btn-ivory { background: var(--ivory); color: var(--navy); }
.btn-ivory:hover { background: #ffffff; }
.btn-ghost { border-color: rgba(246, 244, 238, 0.35); color: #f6f4ee; }
.btn-ghost:hover { border-color: #f6f4ee; }
.btn-sm { min-height: 40px; padding: 0 20px; font-size: 14.5px; }

.over {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.32em;
    color: var(--bronze);
}

#site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 80;
}

.notice {
    background: var(--navy);
    color: rgba(246, 244, 238, 0.85);
    font-size: 13.5px;
    letter-spacing: 0.04em;
    max-height: 38px;
    overflow: hidden;
    transition: max-height 0.26s ease, opacity 0.2s ease;
}
#site-header.is-scrolled .notice {
    max-height: 0;
    opacity: 0;
}
.notice-in {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 38px;
}
.notice a { color: rgba(246, 244, 238, 0.85); }
.notice a:hover { color: #ffffff; }

.masthead {
    background: rgba(250, 249, 246, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hair);
}
.masthead-in {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    min-height: 74px;
}
.wordmark { display: inline-flex; align-items: center; gap: 11px; }
.wordmark-glyph {
    width: 30px;
    height: 30px;
    display: block;
    flex: 0 0 auto;
}
.wordmark-name {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.14em;
}
.mast-nav { display: flex; align-items: center; gap: 26px; margin: 0 auto; }
.mast-nav a {
    font-size: 15px;
    color: var(--body-c);
    letter-spacing: 0.02em;
    padding: 6px 0;
    border-bottom: 1px solid transparent;
    transition: color 0.16s ease, border-color 0.16s ease;
}
.mast-nav a:hover { color: var(--navy); border-bottom-color: var(--bronze); }
.mast-nav a.is-current { color: var(--navy); border-bottom-color: var(--bronze); }
.mast-side { display: flex; align-items: center; gap: 18px; }
.mast-console { font-size: 15px; color: var(--body-c); }
.mast-console:hover { color: var(--navy); }
.lang { position: relative; }
.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 44px;
    padding: 0 2px;
    background: none;
    border: none;
    font-size: 15px;
    color: var(--body-c);
    letter-spacing: 0.02em;
    transition: color 0.16s ease;
}
.lang-btn svg { width: 16px; height: 16px; }
.lang-btn::after {
    content: "";
    width: 6px;
    height: 6px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translate(-1px, -1px);
    transition: transform 0.18s ease;
}
.lang-btn:hover { color: var(--navy); }
.lang.lang-open .lang-btn { color: var(--navy); }
.lang.lang-open .lang-btn::after { transform: rotate(-135deg) translate(-2px, -2px); }
.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 85;
    min-width: 190px;
    padding: 6px;
    background: var(--paper);
    border: 1px solid var(--hair);
    border-radius: 8px;
    box-shadow: 0 18px 36px -22px rgba(22, 37, 61, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity 0.18s ease, visibility 0.18s ease, transform 0.18s ease;
}
.lang.lang-open .lang-menu { opacity: 1; visibility: visible; transform: none; }
.lang-menu a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 44px;
    padding: 0 12px;
    border-radius: 6px;
    font-size: 14.5px;
    color: var(--body-c);
    transition: background 0.15s ease, color 0.15s ease;
}
.lang-menu a:hover { background: var(--ivory); color: var(--navy); }
.lang-menu a span { font-size: 12px; letter-spacing: 0.14em; color: var(--mute); }
.lang-menu a.is-current { color: var(--navy); font-weight: 600; }
.lang-menu a.is-current span { color: var(--bronze); }
.mast-menu {
    display: none;
    background: none;
    border: 1px solid var(--hair-dark);
    border-radius: 6px;
    min-height: 42px;
    padding: 0 16px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0.08em;
}

.veil {
    position: fixed;
    inset: 0;
    z-index: 90;
    background: var(--ivory);
    display: flex;
    flex-direction: column;
    padding: 18px 24px 36px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}
body.veil-open .veil { opacity: 1; visibility: visible; }
body.veil-open { overflow: hidden; }
.veil-head { display: flex; align-items: center; justify-content: space-between; min-height: 56px; }
.veil-close {
    background: none;
    border: 1px solid var(--hair-dark);
    border-radius: 6px;
    min-height: 42px;
    padding: 0 16px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--ink);
}
.veil-links { margin-top: 34px; }
.veil-links a {
    display: block;
    padding: 17px 2px;
    border-bottom: 1px solid var(--hair);
    font-family: var(--serif);
    font-size: 23px;
    font-weight: 600;
    color: var(--ink);
}
.veil-links a span { font-size: 13px; color: var(--bronze); margin-left: 12px; letter-spacing: 0.14em; font-family: var(--sans); }
.veil-links a.is-current { color: var(--bronze-deep); }
.veil-foot { margin-top: auto; display: grid; gap: 12px; }

.sect { padding: 104px 0; }
.sect-tight { padding-top: 0; }
.sect-top {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 52px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--hair);
}
.sect-top .kicker {
    display: block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.32em;
    color: var(--bronze);
    margin-bottom: 12px;
}
.sect-top h2 {
    font-family: var(--serif);
    font-size: clamp(1.65rem, 3vw, 2.2rem);
    font-weight: 700;
    letter-spacing: 0.01em;
    line-height: 1.4;
}
.sect-top .lead { margin-top: 10px; color: var(--body-c); font-size: 15px; max-width: 560px; }
.sect-more {
    flex: 0 0 auto;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--navy);
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--bronze);
    padding-bottom: 3px;
    white-space: nowrap;
}
.sect-more:hover { color: var(--bronze-deep); }

.footing { background: var(--ivory); padding: 60px 0 40px; }
.footing-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr; gap: 36px; }
.footing-brand p { margin-top: 16px; max-width: 240px; font-size: 14px; color: var(--body-c); line-height: 1.9; }
.footing h4 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--mute);
    margin-bottom: 16px;
}
.footing-col li { margin-bottom: 11px; }
.footing-col a { font-size: 14.5px; color: var(--body-c); }
.footing-col a:hover { color: var(--navy); }
.footing-base {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--hair);
    font-size: 13.5px;
    color: var(--mute);
    letter-spacing: 0.03em;
}
.footing-base a { color: var(--mute); }
.footing-base a:hover { color: var(--navy); }

@media (max-width: 1020px) {
    .masthead-in { gap: 20px; }
    .mast-nav { gap: 18px; }
    .mast-side { gap: 14px; }
}

@media (max-width: 768px) {
    body { padding-top: 103px; }
    .mast-nav, .mast-console, .mast-side .btn { display: none; }
    .mast-menu { display: inline-flex; align-items: center; }
    .masthead-in { min-height: 64px; }
    .lang-menu { max-height: calc(100vh - 132px); overflow-y: auto; }
    .notice-in span:last-child { display: none; }
    .sect { padding: 84px 0; }
    .sect-top { flex-direction: column; align-items: flex-start; }
    .footing-grid { grid-template-columns: 1fr 1fr 1fr; }
}

@media (max-width: 560px) {
    .footing-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .masthead-in { gap: 12px; }
    .mast-side { gap: 10px; }
    .mast-menu { padding: 0 12px; }
    .footing-grid { grid-template-columns: 1fr; gap: 28px; }
}