/* ==========================================================================
   城市页「敦煌式」内容区：城市简介 / 热门景点 / 了解城市弹窗
   仅作用于 body.dhlike 且带 .dh-*
   ========================================================================== */
:root {
    --dh-ink: #1f3d36;
    --dh-ink-2: #2b5248;
    --dh-paper: #F8F3E9;
    --dh-paper-2: #FBF7EE;
    --dh-gold: #C9A063;
    --dh-gold-2: #D8B474;
    --dh-line: rgba(31, 61, 54, .14);
    --dh-text: #2a3a35;
    --dh-muted: #6b7770;
}

/* ---------- 通用 ---------- */
.dh-wrap { width: min(1200px, calc(100% - 3rem)); margin: 0 auto; }
.dh-head { text-align: center; margin-bottom: 2.6rem; }
.dh-head__en {
    display: block; font-size: .68rem; letter-spacing: .38em;
    color: var(--dh-gold); margin-bottom: .7rem; text-transform: uppercase;
}
.dh-head h2 {
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, SimSun, serif;
    font-size: clamp(1.7rem, 3.2vw, 2.4rem); letter-spacing: .14em;
    color: var(--dh-ink); margin: 0 0 .7rem; font-weight: 600;
}
.dh-head__sub { font-size: .92rem; color: var(--dh-muted); letter-spacing: .05em; margin: 0; }
.dh-head__line {
    width: 2.4rem; height: 1px; background: linear-gradient(90deg, transparent, var(--dh-gold), transparent);
    margin: 1rem auto 0;
}

/* ---------- 城市简介 ---------- */
.dh-about { background: var(--dh-paper); padding: clamp(3.4rem, 6vw, 5.4rem) 0; }
.dh-about__grid {
    display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(1.6rem, 3.4vw, 3.2rem);
    align-items: center;
}
.dh-about__media {
    position: relative; margin: 0; border-radius: .9rem; overflow: hidden;
    box-shadow: 0 22px 50px -30px rgba(31, 61, 54, .55);
}
.dh-about__media img { display: block; width: 100%; height: clamp(280px, 34vw, 420px); object-fit: cover; }
.dh-about__media figcaption {
    position: absolute; left: 0; right: 0; bottom: 0;
    padding: 1.6rem 1.1rem .9rem; font-size: .74rem; letter-spacing: .16em;
    color: rgba(255, 255, 255, .82);
    background: linear-gradient(0deg, rgba(12, 20, 17, .78), transparent);
}
.dh-about__body p { font-size: .95rem; line-height: 2.05; color: var(--dh-text); margin: 0 0 1rem; }
.dh-about__body p.dh-lead { font-size: 1.02rem; color: var(--dh-ink); }
.dh-chips { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; margin: 1.3rem 0 1.6rem; }
.dh-chips li {
    font-size: .74rem; letter-spacing: .1em; color: var(--dh-ink);
    padding: .32rem .8rem; border: 1px solid var(--dh-line); border-radius: 9999px;
    background: rgba(255, 255, 255, .6);
}
.dh-btn {
    display: inline-flex; align-items: center; gap: .55rem;
    padding: .78rem 1.5rem; border-radius: 9999px; border: 1px solid var(--dh-ink);
    background: var(--dh-ink); color: #F7F1E2; cursor: pointer;
    font-size: .84rem; letter-spacing: .12em;
    transition: background .3s, transform .3s, box-shadow .3s;
}
.dh-btn:hover { background: var(--dh-ink-2); transform: translateY(-1px); box-shadow: 0 12px 26px -14px rgba(31, 61, 54, .8); }
.dh-btn svg { width: 1rem; height: 1rem; }

/* ---------- 热门景点 ---------- */
.dh-spots { background: var(--dh-paper-2); padding: clamp(3.4rem, 6vw, 5.4rem) 0 clamp(3.6rem, 6.4vw, 5.8rem); }
.dh-spotlist { display: grid; gap: 1.1rem; }
.dh-spot {
    position: relative; display: block; min-height: clamp(210px, 24vw, 290px);
    border-radius: 1rem; overflow: hidden; color: #fff; text-decoration: none;
    background: #2b3a35;
    transition: transform .45s ease, box-shadow .45s ease;
}
.dh-spot:hover { transform: translateY(-3px); box-shadow: 0 26px 46px -28px rgba(20, 32, 28, .7); }
.dh-spot__bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(90deg, rgba(10, 17, 14, .94) 0%, rgba(10, 17, 14, .78) 42%, rgba(10, 17, 14, .3) 72%, rgba(10, 17, 14, .45) 100%),
        var(--img);
    background-size: cover, cover;
    background-position: center, center;
    transform: scale(1.02); transition: transform .8s cubic-bezier(.2, .7, .2, 1);
}
.dh-spot:hover .dh-spot__bg { transform: scale(1.06); }
.dh-spot::after { display: none; }
.dh-spot__idx {
    position: absolute; top: 1.1rem; right: 1.5rem; z-index: 2;
    font-family: "Noto Serif SC", serif; font-size: .95rem; letter-spacing: .18em;
    color: rgba(216, 180, 116, .9);
}
.dh-spot__txt { display: block; position: relative; z-index: 2; padding: 1.7rem 1.6rem 1.5rem; max-width: 34rem; }
.dh-spot__cat {
    display: inline-block; font-size: .7rem; letter-spacing: .18em;
    color: rgba(240, 220, 180, .92); margin-bottom: .55rem;
}
.dh-spot__txt h3 {
    font-family: "Noto Serif SC", serif; font-size: clamp(1.35rem, 2.4vw, 1.8rem);
    letter-spacing: .1em; margin: 0 0 .5rem; font-weight: 600;
}
.dh-spot__txt p { font-size: .87rem; line-height: 1.9; color: rgba(255, 255, 255, .82); margin: 0 0 1rem; }
.dh-spot__go { font-size: .76rem; letter-spacing: .16em; color: var(--dh-gold-2); }
.dh-spot__go::after { content: " →"; }

/* ---------- 弹窗 ---------- */
.dh-modal { position: fixed; inset: 0; z-index: 120; display: none; }
.dh-modal.is-open { display: block; }
.dh-modal__mask { position: absolute; inset: 0; background: rgba(10, 16, 14, .62); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.dh-modal__panel {
    position: relative; z-index: 1;
    width: min(880px, calc(100% - 2rem)); max-height: 86svh; margin: 7svh auto 0;
    display: flex; flex-direction: column;
    background: var(--dh-paper-2); border-radius: 1.1rem; overflow: hidden;
    box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .75);
    animation: dhIn .32s cubic-bezier(.2, .8, .2, 1);
}
@keyframes dhIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.dh-modal__head {
    display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start;
    padding: 1.5rem 1.6rem 1.1rem; border-bottom: 1px solid var(--dh-line);
}
.dh-modal__kicker { font-size: .68rem; letter-spacing: .26em; color: var(--dh-gold); margin: 0 0 .4rem; }
.dh-modal__head h3 {
    font-family: "Noto Serif SC", serif; font-size: 1.4rem; letter-spacing: .1em;
    color: var(--dh-ink); margin: 0 0 .4rem;
}
.dh-modal__head p.dh-desc { font-size: .82rem; color: var(--dh-muted); margin: 0; line-height: 1.75; }
.dh-modal__x {
    flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%;
    border: 1px solid var(--dh-line); background: transparent; cursor: pointer;
    color: var(--dh-ink); font-size: 1.1rem; line-height: 1;
}
.dh-modal__x:hover { background: rgba(31, 61, 54, .07); }
.dh-tabs { display: flex; gap: .4rem; padding: 0 1.3rem; border-bottom: 1px solid var(--dh-line); overflow-x: auto; }
.dh-tabs button {
    flex: none; padding: .85rem .9rem; border: 0; background: transparent; cursor: pointer;
    font-size: .82rem; letter-spacing: .1em; color: var(--dh-muted);
    border-bottom: 2px solid transparent;
}
.dh-tabs button.is-active { color: var(--dh-ink); border-bottom-color: var(--dh-gold); }
.dh-panes { padding: 1.4rem 1.6rem 1.8rem; overflow-y: auto; }
.dh-pane { display: none; }
.dh-pane.is-active { display: block; }
.dh-pane p { font-size: .88rem; line-height: 1.95; color: var(--dh-text); margin: 0 0 .9rem; }
.dh-pane h4 {
    font-family: "Noto Serif SC", serif; font-size: .98rem; letter-spacing: .08em;
    color: var(--dh-ink); margin: 1.2rem 0 .5rem;
}
.dh-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem 1.4rem; margin: 1rem 0 0; }
.dh-facts div { display: flex; gap: .6rem; font-size: .84rem; padding-bottom: .55rem; border-bottom: 1px dashed var(--dh-line); }
.dh-facts dt { color: var(--dh-muted); flex: none; }
.dh-facts dd { margin: 0; color: var(--dh-text); }
.dh-list { list-style: none; padding: 0; margin: .4rem 0 0; }
.dh-list li { padding: .7rem 0; border-bottom: 1px dashed var(--dh-line); font-size: .86rem; line-height: 1.8; }
.dh-list li b { display: block; color: var(--dh-ink); letter-spacing: .06em; margin-bottom: .2rem; }
html.dh-lock, html.dh-lock body { overflow: hidden !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .dh-about__grid { grid-template-columns: 1fr; }
    .dh-about__media img { height: 44vw; min-height: 220px; }
}
@media (max-width: 640px) {
    .dh-wrap { width: calc(100% - 2rem); }
    .dh-spot__txt { padding: 2.8rem 1.1rem 1.3rem; }
    .dh-facts { grid-template-columns: 1fr; }
    .dh-modal__panel { width: 100%; max-height: 92svh; margin: 4svh auto 0; border-radius: 1rem 1rem 0 0; }
    .dh-modal__head { padding: 1.2rem 1.1rem .9rem; }
    .dh-panes { padding: 1.1rem 1.1rem 1.6rem; }
    .dh-tabs button { padding: .8rem .7rem; font-size: .78rem; }
}