/* ============================================================
   MNfilm 芒柠影业 · 摄影社团 — 设计系统
   ============================================================ */

:root {
    --bg: #0a0a0d;
    --bg-elev: #101015;
    --card: #131318;
    --line: rgba(236, 232, 224, .09);
    --line-soft: rgba(236, 232, 224, .055);
    --gold: #dfae64;
    --gold-bright: #f0c987;
    --gold-deep: #b98a45;
    --gold-soft: rgba(223, 174, 100, .13);
    --text: #ece8e0;
    --text-dim: #a29d93;
    --text-faint: #6f6b64;
    --font-serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --nav-h: 68px;
    --maxw: 1180px;
    --radius: 14px;
    --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

[hidden] { display: none !important; }

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

a { color: inherit; }

button { font-family: inherit; }

::selection { background: rgba(223, 174, 100, .32); color: #fff; }

:focus-visible {
    outline: 2px solid var(--gold-bright);
    outline-offset: 3px;
    border-radius: 2px;
}

.container {
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: clamp(20px, 4vw, 40px);
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 200;
    padding: 10px 18px;
    background: var(--gold);
    color: #17130b;
    border-radius: 6px;
    font-size: .9rem;
    transform: translateY(-200%);
    transition: transform .2s var(--ease);
}
.skip-link:focus-visible { transform: none; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: .95rem;
    letter-spacing: .08em;
    text-decoration: none;
    cursor: pointer;
    transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}
.btn-primary {
    background: var(--gold);
    color: #17130b;
    font-weight: 600;
}
.btn-primary:hover {
    background: var(--gold-bright);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(223, 174, 100, .28);
}
.btn-ghost {
    background: rgba(10, 10, 13, .35);
    border-color: rgba(240, 201, 135, .55);
    color: var(--gold-bright);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    background: var(--gold-soft);
    border-color: var(--gold-bright);
    transform: translateY(-2px);
}

/* ============================================================
   导航栏
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 90;
    background: transparent;
    transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
    border-bottom: 1px solid transparent;
}
.nav.nav-scrolled {
    background: rgba(10, 10, 13, .85);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--line);
    box-shadow: 0 8px 30px rgba(0, 0, 0, .35);
}
.nav-inner {
    max-width: var(--maxw);
    margin-inline: auto;
    height: var(--nav-h);
    padding-inline: clamp(20px, 4vw, 40px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}
.nav-logo-wrap {
    position: relative;
    width: 46px;
    height: 46px;
    flex-shrink: 0;
}
.nav-logo-wrap img { width: 100%; height: 100%; object-fit: contain; }
.logo-fallback:not([hidden]) {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    border: 1px solid rgba(223, 174, 100, .4);
    border-radius: 6px;
    background: #0b0b0f;
    color: var(--gold-bright);
    font: 12px/1.1 Georgia, serif;
    letter-spacing: .02em;
}
.logo-fallback small { margin-top: 3px; font: 6px/1.2 Arial, sans-serif; letter-spacing: .14em; }
.nav-wordmark { display: flex; flex-direction: column; line-height: 1.25; }
.nav-wordmark strong {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: .14em;
    color: var(--text);
}
.nav-wordmark em {
    font-style: normal;
    font-size: .66rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--gold);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(16px, 2.6vw, 30px);
}
.nav-links a {
    position: relative;
    font-size: .92rem;
    letter-spacing: .06em;
    color: var(--text-dim);
    text-decoration: none;
    padding: 6px 2px;
    transition: color .2s var(--ease);
    white-space: nowrap;
}
.nav-links a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transform: translateX(-50%);
    transition: width .25s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav-links a[aria-current="page"] { color: var(--gold-bright); }
.nav-links a[aria-current="page"]::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.lang-switch {
    padding: 7px 16px;
    border: 1px solid rgba(223, 174, 100, .4);
    border-radius: 999px;
    background: rgba(10, 10, 13, .3);
    color: var(--gold-bright);
    font-size: .8rem;
    letter-spacing: .12em;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease);
}
.lang-switch:hover { background: var(--gold-soft); border-color: var(--gold-bright); }

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 9px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(10, 10, 13, .45);
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--gold-bright);
    border-radius: 2px;
    transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero 全屏轮播
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    color: #fff;
    background: #060608;
}
@supports (min-height: 100svh) {
    .hero { min-height: 100svh; }
}

.hero-slideshow.carousel-frame {
    position: absolute;
    inset: 0;
    border: 0;
    border-radius: 0;
    background: #060608;
}
.hero-stage.carousel-stage {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
    max-height: none;
    background: #060608;
    touch-action: pan-y pinch-zoom;
}

.hero-scrim {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(6, 6, 8, .62) 0%, rgba(6, 6, 8, .18) 42%, transparent 68%),
        linear-gradient(180deg, rgba(6, 6, 8, .5) 0%, rgba(6, 6, 8, .08) 34%, rgba(6, 6, 8, .9) 100%);
}

.hero-content {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    max-width: var(--maxw);
    margin-inline: auto;
    width: 100%;
    padding: 0 clamp(20px, 4vw, 40px) clamp(96px, 13vh, 130px);
}
.hero-eyebrow {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: .76rem;
    letter-spacing: .38em;
    text-transform: uppercase;
    color: var(--gold-bright);
}
.hero-eyebrow::before {
    content: "";
    width: 40px;
    height: 1px;
    background: var(--gold);
    flex-shrink: 0;
}
.hero-title {
    margin-top: 18px;
    font-family: var(--font-serif);
    font-size: clamp(2.7rem, 7.5vw, 5.2rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: .12em;
    text-shadow: 0 2px 30px rgba(0, 0, 0, .5);
}
.hero-tagline {
    margin-top: 18px;
    max-width: 34em;
    font-size: clamp(.98rem, 1.6vw, 1.18rem);
    letter-spacing: .04em;
    color: rgba(236, 232, 224, .86);
    text-shadow: 0 1px 14px rgba(0, 0, 0, .55);
}
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.hero-tools {
    position: absolute;
    top: calc(var(--nav-h) + 16px);
    right: clamp(16px, 3vw, 40px);
    z-index: 4;
    display: flex;
    align-items: center;
    gap: 14px;
}
.hero-counter {
    display: flex;
    align-items: baseline;
    gap: 7px;
    font-variant-numeric: tabular-nums;
    font-size: .8rem;
    letter-spacing: .14em;
    color: rgba(236, 232, 224, .62);
    text-shadow: 0 1px 10px rgba(0, 0, 0, .6);
}
.hero-counter strong {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 500;
    color: var(--gold-bright);
}

.hero-scroll {
    position: absolute;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 4;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 9px;
    font-size: .68rem;
    letter-spacing: .32em;
    color: rgba(236, 232, 224, .66);
    text-decoration: none;
}
.hero-scroll-line {
    width: 1px;
    height: 46px;
    background: linear-gradient(180deg, var(--gold), transparent);
    animation: hero-scroll-cue 2.2s var(--ease) infinite;
}
@keyframes hero-scroll-cue {
    0%   { transform: scaleY(0); transform-origin: top; }
    45%  { transform: scaleY(1); transform-origin: top; }
    55%  { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Hero 箭头：去圆形背景，仅保留简洁箭头 */
.hero-stage .carousel-arrow {
    width: auto;
    height: auto;
    padding: 8px;
    border: 0;
    background: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    font-size: 3rem;
    color: rgba(255, 255, 255, .92);
    text-shadow: 0 2px 20px rgba(0, 0, 0, .55);
    transition: color .2s var(--ease), transform .2s var(--ease);
}
.hero-stage .carousel-arrow:hover {
    background: none;
    border-color: transparent;
    color: var(--gold-bright);
    transform: translateY(-50%) scale(1.15);
}
.hero-stage .carousel-prev { left: 18px; }
.hero-stage .carousel-next { right: 18px; }

/* ============================================================
   轮播通用组件（Hero / 画廊 / 大图共用）
   ============================================================ */
.carousel-frame {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: #08080b;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.carousel-stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    max-height: 640px;
    overflow: hidden;
    background: #050507;
    touch-action: pan-y pinch-zoom;
}
.carousel-track {
    position: absolute;
    inset: 0;
    display: flex;
    width: 100%;
    height: 100%;
}
.carousel-track .carousel-image {
    flex: 0 0 100%;
    min-width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}
.carousel-image {
    display: block;
    width: 100%;
    height: 100%;
    user-select: none;
}
.carousel-stage.is-loading::after {
    content: "";
    position: absolute;
    z-index: 3;
    width: 26px;
    height: 26px;
    border: 2px solid rgba(240, 201, 135, .25);
    border-top-color: var(--gold-bright);
    border-radius: 50%;
    animation: carousel-spin .7s linear infinite;
    pointer-events: none;
}
@keyframes carousel-spin { to { transform: rotate(360deg); } }

.carousel-arrow {
    position: absolute;
    z-index: 4;
    top: 50%;
    transform: translateY(-50%);
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 50%;
    background: rgba(8, 8, 11, .55);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.carousel-arrow:hover {
    background: var(--gold);
    border-color: var(--gold);
    color: #17130b;
    transform: translateY(-50%) scale(1.07);
}
.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }

.carousel-expand {
    position: absolute;
    z-index: 4;
    top: 16px;
    right: 16px;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 50%;
    background: rgba(8, 8, 11, .55);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.carousel-expand:hover {
    background: var(--gold);
    border-color: var(--gold);
    color: #17130b;
}

.carousel-bottomline {
    position: absolute;
    inset: auto 0 0;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 15px 20px;
    border-top: 1px solid rgba(255, 255, 255, .07);
    background: rgba(8, 8, 11, .5);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity .22s var(--ease), transform .22s var(--ease);
}
.carousel-frame:hover .carousel-bottomline,
.carousel-frame.is-keyboard-interacting:focus-within .carousel-bottomline {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.carousel-caption { min-width: 0; }
.carousel-caption-name {
    color: #d6cdbd;
    font-size: .88rem;
    letter-spacing: .05em;
    font-family: var(--font-mono);
}
.carousel-hint { color: var(--text-faint); font-size: .74rem; }

.carousel-tools { display: flex; align-items: center; flex-shrink: 0; gap: 18px; }
.carousel-counter {
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
    font-size: .85rem;
    letter-spacing: .12em;
    color: var(--text-faint);
}
.carousel-counter strong {
    color: var(--gold-bright);
    font-weight: 500;
    font-size: 1.1rem;
}
.carousel-autoplay {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 11px;
    min-height: 36px;
    border: 1px solid rgba(223, 174, 100, .35);
    border-radius: 999px;
    background: rgba(10, 10, 13, .4);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    color: var(--gold-bright);
    font: inherit;
    font-size: .74rem;
    letter-spacing: .06em;
    white-space: nowrap;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease);
}
.carousel-autoplay:hover { background: var(--gold-soft); border-color: var(--gold-bright); }
.carousel-autoplay-icon { width: 12px; text-align: center; }

.carousel-thumbs {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding: 16px 2px 8px;
    scrollbar-width: thin;
    scrollbar-color: #4a3f2c transparent;
    scroll-snap-type: x proximity;
}
.carousel-thumb {
    position: relative;
    display: block;
    flex: 0 0 112px;
    width: 112px;
    height: 76px;
    overflow: hidden;
    border: 2px solid transparent;
    border-radius: 6px;
    background: #070709;
    scroll-snap-align: center;
    opacity: .55;
    transition: opacity .18s var(--ease), border-color .18s var(--ease);
}
.carousel-thumb:hover,
.carousel-thumb:focus-visible { opacity: 1; }
.carousel-thumb[aria-current="true"] {
    opacity: 1;
    border-color: var(--gold);
}
.carousel-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.carousel-thumb-number {
    position: absolute;
    left: 5px;
    bottom: 3px;
    padding: 0 4px;
    border-radius: 2px;
    color: #fff;
    background: rgba(0, 0, 0, .65);
    font: 10px/1.5 var(--font-mono);
}

.carousel-status { color: var(--gold-bright); font-size: .85rem; margin-top: 10px; }
.carousel-status:empty { display: none; }
.noscript-hint { margin-top: 12px; color: var(--text-dim); }

.carousel-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 4;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(240, 201, 135, .75));
    transform-origin: left;
    transform: scaleX(0);
    will-change: transform;
}

/* ============================================================
   内容区块
   ============================================================ */
.section {
    padding: clamp(64px, 9vw, 108px) 0;
    scroll-margin-top: var(--nav-h);
}
.section-gallery {
    background:
        radial-gradient(ellipse 60% 40% at 50% 0%, rgba(223, 174, 100, .05), transparent 70%),
        var(--bg);
}

.section-head { margin-bottom: clamp(30px, 4.5vw, 48px); }
.section-eyebrow {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: .76rem;
    letter-spacing: .34em;
    text-transform: uppercase;
    color: var(--gold);
}
.section-eyebrow::before {
    content: "";
    width: 34px;
    height: 1px;
    background: var(--gold);
    flex-shrink: 0;
}
.section-title {
    margin-top: 14px;
    font-family: var(--font-serif);
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    font-weight: 600;
    letter-spacing: .08em;
    color: var(--text);
}
.section-desc {
    margin-top: 12px;
    max-width: 60ch;
    color: var(--text-dim);
    font-size: .96rem;
}
.section-subhead {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: clamp(38px, 5vw, 56px);
    font-family: var(--font-serif);
    font-size: 1.26rem;
    font-weight: 600;
    letter-spacing: .08em;
    color: var(--text);
}
.section-subhead::before {
    content: "";
    width: 24px;
    height: 1px;
    background: var(--gold);
    flex-shrink: 0;
}

/* ---------- 关于我们 ---------- */
.section-about {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(153deg, transparent 25%, rgba(232, 190, 126, .055) 42%, transparent 59%),
        radial-gradient(ellipse 65% 85% at 8% 80%, rgba(174, 119, 57, .19), transparent 72%),
        radial-gradient(ellipse 55% 75% at 100% 0%, rgba(102, 121, 140, .11), transparent 70%),
        linear-gradient(120deg, #171510, #0d0e11 60%, #0a0a0d);
    box-shadow: inset 0 60px 80px -65px #0a0a0d, inset 0 -60px 80px -65px #0a0a0d;
}
.section-about::before,
.section-about::after {
    content: "";
    position: absolute;
    z-index: 0;
    pointer-events: none;
}
/* Fine, static texture keeps the surface quiet behind the copy. */
.section-about::before {
    inset: 0;
    background: radial-gradient(rgba(240, 218, 184, .16) .5px, transparent .8px) 0 0 / 4px 4px;
    opacity: .18;
}
/* Oversized lens rings sit outside the text column and fade into the edge. */
.section-about::after {
    width: 1000px;
    aspect-ratio: 1;
    left: calc(50% - 1050px);
    bottom: -620px;
    border-radius: 50%;
    background: radial-gradient(circle,
        transparent 0 42%, rgba(226, 182, 113, .12) 42.1% 42.2%,
        transparent 42.3% 49%, rgba(226, 182, 113, .06) 49.1% 49.2%,
        transparent 49.3% 59%, rgba(226, 182, 113, .08) 59.1% 59.2%,
        transparent 59.3%);
    transform: rotate(-20deg) scaleY(.76);
    opacity: .8;
}
.section-about > .container { position: relative; z-index: 1; }

.about-grid {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(34px, 6vw, 84px);
    align-items: start;
}
.about-lead {
    font-family: var(--font-serif);
    font-size: clamp(1.16rem, 1.9vw, 1.45rem);
    line-height: 1.95;
    letter-spacing: .02em;
    color: var(--text);
}
.about-lead strong { color: var(--gold-bright); font-weight: 600; }
.feature-list { display: grid; }
.feature-item {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 18px;
    padding: 22px 0;
    border-top: 1px solid var(--line);
}
.feature-item:last-child { border-bottom: 1px solid var(--line); }
.feature-num {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--gold);
    padding-top: 3px;
}
.feature-item h3 {
    font-size: 1.06rem;
    font-weight: 600;
    letter-spacing: .05em;
}
.feature-item p {
    margin-top: 5px;
    color: var(--text-dim);
    font-size: .92rem;
}

/* ---------- 卡片 ---------- */
.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, .032), rgba(255, 255, 255, .012));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.card:hover {
    border-color: rgba(223, 174, 100, .42);
    transform: translateY(-3px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, .4);
}
.card-grid {
    display: grid;
    gap: 24px;
    margin-top: clamp(30px, 4.5vw, 48px);
}

/* ---------- 活动规划 ---------- */
.activity-grid { grid-template-columns: repeat(2, 1fr); }
.activity-card { padding: 32px 32px 36px; }
.card-num {
    font-family: var(--font-serif);
    font-size: .95rem;
    letter-spacing: .22em;
    color: var(--gold);
}
.activity-card h3 {
    margin-top: 16px;
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: .06em;
}
.activity-card p {
    margin-top: 10px;
    color: var(--text-dim);
    font-size: .94rem;
}

/* ---------- 入社福利 ---------- */
.benefit-grid { grid-template-columns: repeat(2, 1fr); margin-top: 26px; }
.benefit-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 28px 28px 30px;
}
.benefit-index {
    font-family: var(--font-serif);
    font-size: 1.7rem;
    line-height: 1;
    color: var(--gold);
    opacity: .9;
    padding-top: 2px;
}
.benefit-item h3 {
    font-size: 1.06rem;
    font-weight: 600;
    letter-spacing: .05em;
}
.benefit-item p {
    margin-top: 6px;
    color: var(--text-dim);
    font-size: .92rem;
}

/* ---------- 加入我们 ---------- */
.section-contact {
    background:
        radial-gradient(ellipse 55% 45% at 50% 100%, rgba(223, 174, 100, .05), transparent 70%),
        var(--bg);
    padding: 44px 0 64px;
}
.section-contact .section-head { margin-bottom: 26px; }
.contact-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 0; }
.contact-card {
    text-align: center;
    padding: 26px 20px 28px;
}
.contact-role {
    font-size: .7rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--gold);
}
.contact-name {
    margin-top: 8px;
    font-family: var(--font-serif);
    font-size: 1.28rem;
    font-weight: 600;
    letter-spacing: .04em;
}
.contact-wechat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding: 6px 13px;
    border: 1px dashed rgba(223, 174, 100, .38);
    border-radius: 8px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: .8rem;
    letter-spacing: .02em;
    word-break: break-all;
}
.contact-wechat svg { flex-shrink: 0; color: var(--gold); }

/* ============================================================
   MNtech
   ============================================================ */
.section-mntech {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        radial-gradient(ellipse 55% 45% at 80% 10%, rgba(100, 160, 220, .06), transparent 70%),
        radial-gradient(ellipse 50% 50% at 20% 100%, rgba(223, 174, 100, .06), transparent 70%),
        var(--bg);
}
.section-mntech::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(236, 232, 224, .03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(236, 232, 224, .03) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
}
.section-mntech > .container { position: relative; z-index: 1; }

.mntech-hero {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: clamp(34px, 5vw, 72px);
    align-items: center;
    padding: clamp(26px, 4vw, 40px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background:
        linear-gradient(135deg, rgba(223, 174, 100, .07), rgba(100, 160, 220, .04) 60%, transparent),
        linear-gradient(180deg, rgba(255, 255, 255, .03), rgba(255, 255, 255, .01));
}
.mntech-hero-content { min-width: 0; }
.mntech-brand {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}
.mntech-brand-icon {
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    border: 1px solid rgba(223, 174, 100, .45);
    background: rgba(223, 174, 100, .1);
    color: var(--gold-bright);
    font-size: 1.6rem;
    box-shadow: 0 0 28px rgba(223, 174, 100, .18);
}
.mntech-brand-name {
    font-family: var(--font-mono);
    font-size: 1.65rem;
    letter-spacing: .12em;
    color: var(--text);
}
.mntech-brand-tagline {
    font-size: .88rem;
    letter-spacing: .04em;
    color: var(--gold-bright);
    margin-top: 2px;
}
.mntech-hero-lead {
    font-size: clamp(1.02rem, 1.4vw, 1.15rem);
    line-height: 1.85;
    color: var(--text-dim);
    max-width: 56ch;
}
.mntech-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 28px;
}

.mntech-hero-visual {
    display: grid;
    place-items: center;
    min-height: 240px;
}
.mntech-orbit {
    position: relative;
    width: 220px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
}
.mntech-orbit-core {
    z-index: 2;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    letter-spacing: .1em;
    color: var(--gold-bright);
    text-shadow: 0 0 20px rgba(223, 174, 100, .45);
}
.mntech-orbit-ring {
    position: absolute;
    border: 1px solid rgba(223, 174, 100, .25);
    border-radius: 50%;
}
.mntech-orbit-ring-1 { inset: 0; border-top-color: rgba(223, 174, 100, .7); animation: mntech-spin 10s linear infinite; }
.mntech-orbit-ring-2 { inset: 32px; border-bottom-color: rgba(100, 160, 220, .55); animation: mntech-spin 14s linear infinite reverse; }
.mntech-orbit-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gold-bright);
    box-shadow: 0 0 12px var(--gold-bright);
    offset-path: circle(45% at 50% 50%);
    offset-rotate: 0deg;
    animation: mntech-orbit 6s linear infinite;
    animation-delay: var(--delay, 0s);
}
@keyframes mntech-spin { to { transform: rotate(360deg); } }
@keyframes mntech-orbit {
    0%   { offset-distance: 0%; opacity: 1; }
    90%  { opacity: .25; }
    100% { offset-distance: 100%; opacity: 1; }
}

.mntech-grid { grid-template-columns: repeat(3, 1fr); }
.mntech-card {
    padding: 28px 26px 30px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.mntech-icon {
    display: block;
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    border: 1px solid rgba(223, 174, 100, .35);
    background: rgba(223, 174, 100, .08);
    font-size: 1.25rem;
}
.mntech-card h3 {
    font-size: 1.08rem;
    font-weight: 600;
    letter-spacing: .04em;
    color: var(--text);
}
.mntech-card p {
    font-size: .9rem;
    line-height: 1.7;
    color: var(--text-dim);
}

/* ============================================================
   页脚
   ============================================================ */
footer {
    border-top: 1px solid var(--line);
    padding: 38px 0 44px;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    color: var(--text-faint);
    font-size: .86rem;
}
.footer-links { display: flex; gap: 22px; }
.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color .2s var(--ease);
}
.footer-links a:hover { color: var(--gold-bright); }

/* ============================================================
   大图查看（dialog）
   ============================================================ */
.carousel-dialog {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    max-width: none;
    max-height: none;
    margin: 0;
    padding: 24px;
    border: 0;
    background: rgba(7, 7, 9, .98);
    color: var(--text);
}
.carousel-dialog::backdrop { background: #050507; }
.carousel-dialog-inner {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 14px;
    height: 100%;
    max-width: 1800px;
    margin: auto;
}
.carousel-dialog-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    color: var(--text-dim);
    font-size: .78rem;
    letter-spacing: .26em;
    text-transform: uppercase;
}
.carousel-close {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: transparent;
    color: var(--gold-bright);
    font: 26px/1 var(--font-sans);
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease);
}
.carousel-close:hover { background: var(--gold-soft); border-color: var(--gold); }
.carousel-dialog-stage {
    height: 100%;
    aspect-ratio: auto;
    max-height: none;
    min-height: 0;
}
.carousel-dialog-stage .carousel-image { object-fit: contain; }
.carousel-dialog-count {
    text-align: center;
    color: var(--gold-bright);
    font-variant-numeric: tabular-nums;
    letter-spacing: .14em;
}
body.gallery-open { overflow: hidden; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
    .nav-toggle { display: flex; }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px clamp(20px, 4vw, 40px) 18px;
        background: rgba(10, 10, 13, .96);
        -webkit-backdrop-filter: blur(16px);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--line);
        box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
        display: none;
    }
    .nav-open .nav-links { display: flex; }
    .nav-links a {
        padding: 14px 4px;
        font-size: 1rem;
        border-bottom: 1px solid var(--line-soft);
    }
    .nav-links a:last-child { border-bottom: 0; }
    .nav-links a::after { display: none; }
    .hero-content { padding-bottom: 100px; }
    .hero-scroll { display: none; }
    .hero-tools { top: calc(var(--nav-h) + 12px); }

    .mntech-hero { grid-template-columns: 1fr; }
    .mntech-hero-visual { order: -1; min-height: 180px; }
    .mntech-orbit { width: 160px; }
    .mntech-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
    :root { --nav-h: 60px; }
    .section { padding: 56px 0; }
    .hero { min-height: 100svh; }
    .hero-content { padding-bottom: 86px; }
    .hero-title { letter-spacing: .08em; }
    .hero-cta { margin-top: 26px; }
    .btn { padding: 12px 24px; font-size: .9rem; }
    .hero-tools { gap: 10px; right: 14px; }
    .hero-counter strong { font-size: 1.2rem; }
    .carousel-autoplay-label { display: none; }
    .carousel-autoplay { padding: 7px 11px; }
    .carousel-arrow { width: 38px; height: 38px; font-size: 1.4rem; }
    .carousel-prev { left: 10px; }
    .carousel-next { right: 10px; }
    .hero-stage .carousel-arrow { width: auto; height: auto; font-size: 2.2rem; }
    .hero-stage .carousel-prev { left: 6px; }
    .hero-stage .carousel-next { right: 6px; }
    .carousel-expand { width: 36px; height: 36px; top: 10px; right: 10px; font-size: 1.05rem; }
    .carousel-stage { aspect-ratio: 3 / 2; max-height: none; }
    .carousel-bottomline { padding: 11px 12px; }
    .carousel-tools { gap: 10px; }
    .carousel-thumbs { gap: 8px; padding-top: 12px; }
    .carousel-thumb { flex-basis: 88px; width: 88px; height: 60px; }

    .section-about {
        background:
            radial-gradient(ellipse 100% 50% at 0% 10%, rgba(174, 119, 57, .16), transparent 80%),
            linear-gradient(155deg, #141310, #0a0a0d 75%);
    }
    .section-about::after { left: -590px; bottom: -500px; opacity: .4; }
    .about-grid { grid-template-columns: 1fr; gap: 34px; }
    .activity-grid,
    .benefit-grid,
    .contact-grid { grid-template-columns: 1fr; }
    .contact-card { padding: 30px 22px 32px; }

    .mntech-hero { padding: 22px; }
    .mntech-brand-icon { width: 48px; height: 48px; font-size: 1.35rem; }
    .mntech-brand-name { font-size: 1.4rem; }
    .mntech-grid { grid-template-columns: 1fr; }
    .mntech-card { padding: 24px 22px; }

    .carousel-dialog { padding: 12px; }
    .carousel-dialog-stage { aspect-ratio: auto; }
    footer { padding: 30px 0 36px; }
    .footer-inner { justify-content: center; text-align: center; }
}

/* 触屏设备：常显底部信息条 */
@media (hover: none) {
    .carousel-bottomline {
        opacity: 1;
        pointer-events: auto;
        transform: none;
    }
}

/* ============================================================
   全局视觉增强
   ============================================================ */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: .035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .55s var(--ease), transform .55s var(--ease);
    will-change: opacity, transform;
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.section-head,
.about-grid,
.activity-grid,
.benefit-grid,
.mntech-hero,
.mntech-grid,
.contact-grid,
.feature-list { transition-delay: 0ms; }

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .hero-scroll-line { animation: none; }
    .carousel-progress { transition: none !important; }
}