/* ==========================================================================
   3djz.com — VSPACE 建筑可视化 作品站
   设计语言参考自原站:深藏青 #2B2D3A + 珊瑚粉 / 橙 / 紫 / 青四色点缀
   纯 CSS,零依赖。
   ========================================================================== */

/* ---------- 变量 ---------- */
:root {
  --navy: #2B2D3A;
  --navy-2: #23252F;
  --navy-3: #1A1C24;
  --ink: #1F2129;
  --body: #4A4D59;
  --muted: #8A8D99;
  --line: #E6E6E2;
  --paper: #FFFFFF;
  --paper-2: #F7F7F5;
  --paper-3: #EFEFEA;

  --c1: #EB767E;
  --c2: #FFA979;
  --c3: #B687E3;
  --c4: #41C9A5;

  --accent: var(--c1);
  --radius: 10px;
  --radius-lg: 18px;
  --shadow-s: 0 2px 10px rgba(20, 22, 30, .06);
  --shadow-m: 0 10px 34px rgba(20, 22, 30, .10);
  --shadow-l: 0 26px 70px rgba(20, 22, 30, .18);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --shell: 1240px;
  --pad: 22px;

  /* 字体栈刻意只用各系统自带的常见字体,并按"先拉丁、后中文"的顺序排列。
     注意:不要在这里加 "Inter" —— 该名字在部分环境下会命中一个符号字体,
     导致拉丁字母全部渲染成怪字符。 */
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "微软雅黑",
          "Hiragino Sans GB", "Source Han Sans SC", Arial, Helvetica, sans-serif;
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
  background: var(--paper);
  overflow-x: hidden;
}
body.is-locked { overflow: hidden; }
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--ink); font-weight: 600; line-height: 1.25; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
input, textarea { font: inherit; }
::selection { background: var(--accent); color: #fff; }

.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 var(--pad); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--navy); color: #fff; padding: 10px 18px;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; position: relative; }
.section--tight { padding: 72px 0; }
.section--paper { background: var(--paper-2); }
.section--dark { background: var(--navy); color: #B9BCC7; }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }

.sec-head { margin-bottom: 44px; max-width: 780px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 11px; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.kicker::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.sec-head--center .kicker::after { content: ""; width: 26px; height: 2px; background: currentColor; }
.sec-title {
  font-size: clamp(28px, 4.4vw, 46px);
  letter-spacing: -.02em; text-transform: uppercase;
}
.sec-title .rotator { color: var(--accent); }
.sec-title .rotator span { display: inline-block; }
.sec-title .rotator .cursor {
  display: inline-block; width: 2px; height: .92em; background: currentColor;
  vertical-align: -.08em; margin-left: 3px;
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }
.sec-lead { margin-top: 18px; font-size: 16px; color: inherit; opacity: .82; }
.sec-head--center .sec-lead { margin-left: auto; margin-right: auto; max-width: 660px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 30px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
  background: var(--accent); color: #fff;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(235, 118, 126, .34); }
.btn--ghost { background: transparent; color: #fff; box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, .45); }
.btn--ghost:hover { background: rgba(255, 255, 255, .1); box-shadow: inset 0 0 0 1.5px #fff; }
.btn--dark { background: var(--navy); }
.btn--dark:hover { box-shadow: 0 12px 28px rgba(43, 45, 58, .3); }

/* ---------- 首屏加载 ---------- */
#preloader {
  position: fixed; inset: 0; z-index: 999;
  display: grid; place-items: center;
  background: var(--navy-3);
  transition: opacity .6s var(--ease), visibility .6s;
}
#preloader.is-done { opacity: 0; visibility: hidden; }
.pl-box { text-align: center; }
.pl-logo {
  font-size: 22px; font-weight: 700; letter-spacing: .42em;
  color: #fff; padding-left: .42em;
}
.pl-bar { width: 168px; height: 2px; margin: 20px auto 0; background: rgba(255, 255, 255, .14); overflow: hidden; }
.pl-bar i { display: block; width: 40%; height: 100%; background: var(--accent); animation: slide 1.1s var(--ease) infinite; }
@keyframes slide { 0% { transform: translateX(-110%); } 100% { transform: translateX(360%); } }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 20px var(--pad);
  transition: transform .45s var(--ease), background .35s var(--ease),
              box-shadow .35s var(--ease), padding .35s var(--ease);
}
.nav__inner { width: 100%; max-width: var(--shell); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.nav__brand { display: flex; align-items: baseline; gap: 10px; color: #fff; }
.nav__brand b { font-size: 17px; font-weight: 700; letter-spacing: .3em; padding-left: .3em; }
.nav__brand i { font-style: normal; font-size: 11px; letter-spacing: .16em; opacity: .68; }
.nav__menu { display: flex; align-items: center; gap: 6px; }
.nav__menu a {
  position: relative; padding: 9px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: rgba(255, 255, 255, .74); transition: color .25s, background .25s;
}
.nav__menu a::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 2px;
  background: var(--accent); transform: translateX(-50%); transition: width .3s var(--ease);
}
.nav__menu a:hover { color: #fff; }
.nav__menu a:hover::after, .nav__menu a.is-active::after { width: 22px; }
.nav__menu a.is-active { color: #fff; }
.nav__side { display: flex; align-items: center; gap: 12px; }

.lang-switch {
  display: flex; align-items: center; padding: 3px;
  border-radius: 999px; background: rgba(255, 255, 255, .13);
}
.lang-switch button {
  padding: 5px 12px; border-radius: 999px; font-size: 11px; font-weight: 600;
  letter-spacing: .1em; color: rgba(255, 255, 255, .72); transition: .25s;
}
.lang-switch button.is-on { background: #fff; color: var(--navy); }

/* 滚过首屏后实体化 */
.nav.is-solid {
  background: rgba(255, 255, 255, .93);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 var(--line), 0 8px 30px rgba(20, 22, 30, .06);
  padding-top: 12px; padding-bottom: 12px;
}
.nav.is-solid .nav__brand, .nav.is-solid .nav__menu a { color: var(--ink); }
.nav.is-solid .nav__menu a { color: var(--muted); }
.nav.is-solid .nav__menu a:hover, .nav.is-solid .nav__menu a.is-active { color: var(--ink); }
.nav.is-solid .lang-switch { background: var(--paper-3); }
.nav.is-solid .lang-switch button { color: var(--muted); }
.nav.is-solid .lang-switch button.is-on { background: var(--navy); color: #fff; }
.nav.is-hidden { transform: translateY(-105%); }

.nav__burger { display: none; width: 40px; height: 40px; border-radius: 8px; }
.nav__burger span { display: block; width: 20px; height: 2px; margin: 4px auto; background: currentColor; transition: .3s; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 130px 0 90px; overflow: hidden;
  background: var(--navy-3); color: #C9CCD6;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__bg img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.08);
  transition: opacity 1.4s var(--ease), transform 8s linear;
}
.hero__bg img.is-on { opacity: .34; transform: scale(1); }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(1000px 620px at 78% 12%, rgba(235, 118, 126, .20), transparent 62%),
    radial-gradient(760px 520px at 12% 82%, rgba(65, 201, 165, .16), transparent 62%),
    linear-gradient(180deg, rgba(26, 28, 36, .72), rgba(26, 28, 36, .88));
}
.hero__grid {
  position: absolute; inset: 0; z-index: 1; opacity: .35; pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 74px 74px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 78%);
}
.hero__inner { position: relative; z-index: 2; }

/* 首屏社交 */
.hero__social { position: absolute; top: 0; right: var(--pad); z-index: 3; display: flex; gap: 8px; }
.hero__social a {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .18); color: rgba(255, 255, 255, .7);
  transition: .3s var(--ease);
}
.hero__social a:hover { background: #fff; color: var(--navy); border-color: #fff; transform: translateY(-3px); }
.hero__social svg { width: 15px; height: 15px; }

.hero__eyebrow {
  display: inline-block; margin-bottom: 22px; padding: 7px 16px; border-radius: 999px;
  font-size: 11px; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
  color: #fff; background: rgba(255, 255, 255, .08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .14);
}
.hero__title {
  max-width: 16em; font-size: clamp(30px, 5.6vw, 62px); font-weight: 700;
  line-height: 1.12; letter-spacing: -.025em; color: #fff;
}
.hero__title .hl { color: var(--c1); }
.hero__sub { max-width: 42em; margin-top: 22px; font-size: clamp(14px, 1.7vw, 17px); color: rgba(255, 255, 255, .66); }

.hero__scroll {
  position: absolute; left: 50%; bottom: 26px; z-index: 3; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 10px; letter-spacing: .24em; text-transform: uppercase; color: rgba(255, 255, 255, .5);
}
.hero__scroll i {
  width: 1px; height: 42px; background: linear-gradient(180deg, rgba(255, 255, 255, .5), transparent);
  animation: drop 1.9s var(--ease) infinite;
}
@keyframes drop { 0% { transform: scaleY(.2); transform-origin: top; opacity: 0; } 40% { opacity: 1; } 100% { transform: scaleY(1); transform-origin: top; opacity: 0; } }

/* 首屏四宫格 */
.hero__tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 62px; }
.tile {
  position: relative; padding: 26px 22px 24px; border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .05); overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .10);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), background .45s var(--ease);
}
.tile::before {
  content: ""; position: absolute; inset: auto 0 0 0; height: 3px;
  background: var(--tc, var(--c1)); transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--ease);
}
.tile::after {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(320px 180px at 50% 0%, var(--tc, var(--c1)), transparent 70%);
  transition: opacity .5s var(--ease);
}
.tile:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .085); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2), var(--shadow-l); }
.tile:hover::before { transform: scaleX(1); }
.tile:hover::after { opacity: .22; }
.tile__ico {
  position: relative; display: block; width: 40px; height: 40px; margin-bottom: 18px;
  color: var(--tc, var(--c1)); transition: transform .45s var(--ease);
}
.tile:hover .tile__ico { transform: translateY(-3px) scale(1.06); }
.tile__ico svg { width: 100%; height: 100%; }
.tile__name { position: relative; font-size: 16px; font-weight: 600; color: #fff; letter-spacing: .02em; }
.tile__desc { position: relative; margin-top: 5px; font-size: 12px; color: rgba(255, 255, 255, .52); }
.tile__no {
  position: absolute; top: 16px; right: 18px; font-size: 11px; font-weight: 600;
  letter-spacing: .1em; color: rgba(255, 255, 255, .28);
}

/* ---------- 首屏长条图片展示栏 ---------- */
.strip { position: relative; z-index: 2; margin-bottom: 56px; }
.strip__frame {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  aspect-ratio: 24 / 5;                        /* 与素材 1920×400 一致 */
  background: rgba(255, 255, 255, .05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12), var(--shadow-l);
}
.strip__slides { position: absolute; inset: 0; }
.strip__slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center 50%;
  opacity: 0;
  /* 未激活状态:略偏右、略放大 —— 切换时向左轻推并淡入,形成"推进"感 */
  transform: translateX(1.2%) scale(1.05);
  transition: opacity 1.1s var(--ease), transform 1.6s var(--ease);
  will-change: opacity, transform;
}
.strip__slide.is-on { opacity: 1; transform: translateX(0) scale(1); }
/* 底部压暗一层,让圆点和计数看得清 */
.strip__frame::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 40%; z-index: 2;
  background: linear-gradient(180deg, transparent, rgba(14, 16, 22, .55));
  pointer-events: none;
}
.strip__dots {
  position: absolute; left: 50%; bottom: 14px; z-index: 4;
  transform: translateX(-50%); display: flex; gap: 7px;
}
.strip__dots button {
  width: 7px; height: 7px; padding: 0; border-radius: 999px;
  background: rgba(255, 255, 255, .42);
  transition: .35s var(--ease);
}
.strip__dots button:hover { background: rgba(255, 255, 255, .8); }
.strip__dots button.is-on { width: 22px; background: #fff; }
.strip__nav {
  position: absolute; top: 50%; z-index: 4; transform: translateY(-50%);
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  color: #fff; background: rgba(18, 20, 27, .38);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22);
  opacity: 0; transition: .35s var(--ease);
}
.strip__frame:hover .strip__nav, .strip__nav:focus-visible { opacity: 1; }
.strip__nav:hover { background: rgba(18, 20, 27, .68); }
.strip__nav--prev { left: 14px; }
.strip__nav--next { right: 14px; }
.strip__nav svg { width: 19px; height: 19px; }
.strip__count {
  position: absolute; right: 16px; bottom: 11px; z-index: 4;
  font-size: 11px; font-weight: 600; letter-spacing: .14em;
  color: rgba(255, 255, 255, .82); font-variant-numeric: tabular-nums;
}

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }
.reveal[data-delay="5"] { transition-delay: .40s; }

/* ---------- 关于 ---------- */
.about__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: start; }
.about__text h4 { font-size: 13px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.about__text p { font-size: 15.5px; }

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.stat {
  padding: 22px 20px; border-radius: var(--radius); background: var(--paper-2);
  box-shadow: inset 0 0 0 1px var(--line);
}
.stat b { display: block; font-size: 34px; font-weight: 700; color: var(--navy); letter-spacing: -.02em; line-height: 1.1; }
.stat span { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }

.bars { margin-top: 54px; }
.bars h4 { font-size: 13px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); margin-bottom: 24px; }
.bar-row { margin-bottom: 20px; }
.bar-row__top { display: flex; justify-content: space-between; font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--navy); margin-bottom: 9px; }
.bar-row__track { height: 6px; border-radius: 999px; background: var(--paper-3); overflow: hidden; }
.bar-row__fill { height: 100%; width: 0; border-radius: 999px; background: var(--bc, var(--c1)); transition: width 1.5s var(--ease); }

/* ---------- 横幅轮播 ---------- */
.banner { position: relative; height: clamp(240px, 38vw, 460px); overflow: hidden; background: var(--navy); }
.banner__slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1.2s var(--ease);
  background-size: cover; background-position: center;
}
.banner__slide.is-on { opacity: 1; }
.banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26, 28, 36, .34), rgba(26, 28, 36, .5)); }
.banner__dots { position: absolute; left: 50%; bottom: 18px; z-index: 2; transform: translateX(-50%); display: flex; gap: 8px; }
.banner__dots button { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .38); transition: .3s; }
.banner__dots button.is-on { width: 26px; border-radius: 999px; background: #fff; }

/* ---------- 作品 ---------- */
.works__bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 18px; margin-bottom: 34px;
}
.filters { display: flex; flex-wrap: wrap; gap: 9px; }
.filters button {
  padding: 9px 18px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); background: var(--paper-2);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: .3s var(--ease);
}
.filters button:hover { color: var(--ink); transform: translateY(-1px); }
.filters button.is-on { background: var(--navy); color: #fff; box-shadow: none; }
.works__count { font-size: 12px; letter-spacing: .1em; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  position: relative; display: block; width: 100%; text-align: left;
  border-radius: var(--radius); overflow: hidden; background: var(--paper-3);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.card.is-hiding { opacity: 0; transform: scale(.94); }
.card.is-showing { animation: cardIn .5s var(--ease) both; }
@keyframes cardIn { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-m), inset 0 0 0 1px transparent; }
.card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: linear-gradient(135deg, #ECE9E2, #DEDCD4); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.card:hover .card__media img { transform: scale(1.07); }
.card__mask {
  position: absolute; inset: 0; display: flex; align-items: flex-end; padding: 18px;
  background: linear-gradient(180deg, transparent 40%, rgba(26, 28, 36, .82));
  opacity: 0; transition: opacity .45s var(--ease);
}
.card:hover .card__mask { opacity: 1; }
.card__mask em { font-style: normal; font-size: 11px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: rgba(255, 255, 255, .8); }
.card__mask em::after { content: " →"; }
.card__ph {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: #A9A69E;
}
.card__tag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 5px 11px; border-radius: 999px;
  font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: #fff; background: var(--cc, var(--c1));
}
.card__num {
  position: absolute; top: 12px; right: 14px; z-index: 2;
  font-size: 11px; font-weight: 700; letter-spacing: .1em;
  color: rgba(255, 255, 255, .92); text-shadow: 0 1px 6px rgba(0, 0, 0, .45);
}
/* 有视频的作品，在卡片上打一个「视频」小标 */
.card__vid {
  position: absolute; left: 12px; bottom: 12px; z-index: 2;
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px 4px 8px; border-radius: 999px;
  background: rgba(26, 28, 36, .66); color: #fff;
  font-size: 10px; font-weight: 700; letter-spacing: .12em;
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.card__vid svg { width: 11px; height: 11px; }
.card__body { padding: 16px 18px 18px; background: #fff; }
.card__title { font-size: 15px; font-weight: 600; color: var(--ink); }
.card__meta { margin-top: 4px; font-size: 12px; color: var(--muted); }
.card__dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--cc, var(--c1)); margin-right: 7px; vertical-align: 1px; }

.works__more { margin-top: 40px; text-align: center; }
.works__empty { padding: 60px 20px; text-align: center; color: var(--muted); }

/* ---------- 大图浏览 ---------- */
.viewer {
  position: fixed; inset: 0; z-index: 200; display: flex; flex-direction: column;
  background: #353535; opacity: 0; visibility: hidden;
  transition: opacity .35s var(--ease), visibility .35s;
}
.viewer.is-open { opacity: 1; visibility: visible; }
.viewer__top {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 16px 22px; color: #fff; flex: 0 0 auto;
}
.viewer__title { font-size: 15px; font-weight: 600; }
.viewer__sub { font-size: 12px; color: rgba(255, 255, 255, .5); margin-top: 2px; }
.viewer__tools { display: flex; align-items: center; gap: 8px; }
.viewer__tools button {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  color: #fff; background: rgba(255, 255, 255, .1); transition: .25s;
}
.viewer__tools button:hover { background: rgba(255, 255, 255, .22); }
.viewer__tools svg { width: 16px; height: 16px; }
.viewer__stage { position: relative; flex: 1 1 auto; overflow: hidden; }
.viewer__img {
  position: absolute; inset: 0; margin: auto; max-width: 100%; max-height: 100%;
  width: auto; height: auto; object-fit: contain;
  transition: transform .35s var(--ease); transform-origin: center center;
}
.viewer__img.is-zoom { cursor: zoom-out; }
.viewer__stage { cursor: zoom-in; }
.viewer__stage.is-zoomed { cursor: zoom-out; }
.viewer__nav {
  position: absolute; top: 50%; z-index: 3; transform: translateY(-50%);
  display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%;
  color: #fff; background: rgba(0, 0, 0, .34); transition: .25s;
}
.viewer__nav:hover { background: rgba(0, 0, 0, .6); }
.viewer__nav--prev { left: 18px; }
.viewer__nav--next { right: 18px; }
.viewer__nav svg { width: 20px; height: 20px; }
.viewer__bottom { flex: 0 0 auto; padding: 12px 22px 18px; background: rgba(0, 0, 0, .3); }
.viewer__strip { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
.viewer__strip::-webkit-scrollbar { height: 6px; }
.viewer__strip::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .22); border-radius: 99px; }
.viewer__strip button {
  position: relative; flex: 0 0 auto; width: 96px; height: 62px; border-radius: 6px; overflow: hidden;
  opacity: .46; transition: .25s; box-shadow: 0 0 0 2px transparent;
}
.viewer__strip button img { width: 100%; height: 100%; object-fit: cover; }
/* 缩略图条里的视频格:同样用播放图标表示 */
.viewer__strip button.is-video img { position: absolute; inset: 0; filter: brightness(.42) saturate(.6); }
.viewer__strip .stripPlay {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: rgba(235, 118, 126, .95);
}
.viewer__strip .stripPlay svg { width: 13px; height: 13px; margin-left: 1px; }
.viewer__strip button:hover { opacity: .82; }
.viewer__strip button.is-on { opacity: 1; box-shadow: 0 0 0 2px var(--c1); }
.viewer__hint { margin-top: 8px; font-size: 11px; letter-spacing: .1em; color: rgba(255, 255, 255, .42); text-align: center; }
.viewer__loading {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .2); border-top-color: var(--c1);
  animation: spin .8s linear infinite; opacity: 0; transition: opacity .25s;
}
.viewer__loading.is-on { opacity: 1; }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* 视频播放位:在浏览大图里占用一个「大图」的位置,用播放图标代替 */
.viewer__video {
  position: absolute; inset: 0; z-index: 2;
  display: grid; place-items: center; overflow: hidden;
  color: #fff; text-decoration: none;
}
.viewer__video[hidden] { display: none; }
.viewer__videoBg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transform: scale(1.05);
  filter: brightness(.4) saturate(.75);
}
.viewer__videoPlay {
  position: relative; z-index: 2; display: grid; place-items: center;
  width: 96px; height: 96px; border-radius: 50%;
  background: rgba(235, 118, 126, .94);
  box-shadow: 0 16px 46px rgba(0, 0, 0, .5);
  transition: transform .3s var(--ease), background .3s;
}
.viewer__videoPlay svg { width: 40px; height: 40px; margin-left: 5px; }
.viewer__video:hover .viewer__videoPlay { transform: scale(1.09); }
.viewer__videoText {
  position: absolute; z-index: 2; left: 0; right: 0; bottom: 30px;
  display: grid; gap: 6px; justify-items: center; text-align: center; padding: 0 24px;
}
.viewer__videoText b { font-size: 17px; font-weight: 600; letter-spacing: .02em; }
.viewer__videoText em { font-style: normal; font-size: 12px; letter-spacing: .05em; color: rgba(255, 255, 255, .62); }
/* 链接还没填时的样子:不假装能点,给出提示 */
.viewer__video.is-pending { cursor: default; }
.viewer__video.is-pending .viewer__videoPlay { background: rgba(255, 255, 255, .16); box-shadow: none; }
.viewer__video.is-pending .viewer__videoText em { color: #FFB08A; }

/* ---------- 服务 ---------- */
.steps { display: grid; gap: 22px; }
.step {
  display: grid; grid-template-columns: 96px 1fr; gap: 30px; align-items: start;
  padding: 30px 32px; border-radius: var(--radius-lg);
  background: #fff; box-shadow: inset 0 0 0 1px var(--line);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.step__ico {
  position: relative; width: 76px; height: 76px; border-radius: 20px;
  display: grid; place-items: center; color: #fff; background: var(--sc, var(--c1));
  transition: transform .45s var(--ease);
}
.step:hover .step__ico { transform: rotate(-5deg) scale(1.05); }
.step__ico svg { width: 32px; height: 32px; }
.step__no { font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--sc, var(--c1)); }
.step__title { font-size: 20px; margin: 6px 0 10px; }
.step__desc { font-size: 14.5px; margin: 0; }

.cta {
  position: relative; overflow: hidden; padding: 66px 0; text-align: center;
  background: var(--navy); color: #fff;
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(620px 320px at 50% 0%, rgba(235, 118, 126, .26), transparent 70%);
}
.cta__title { position: relative; font-size: clamp(20px, 3.2vw, 32px); letter-spacing: .04em; text-transform: uppercase; color: #fff; }
.cta .btn { position: relative; margin-top: 28px; }

/* ---------- 联系 ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.info-item { padding: 22px 0; border-bottom: 1px solid var(--line); }
.info-item:first-of-type { padding-top: 0; }
.info-item h4 { font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.info-item p { margin: 0; font-size: 14.5px; color: var(--ink); }
.info-item a { transition: color .25s; }
.info-item a:hover { color: var(--accent); }
.info-item .sub { font-size: 12px; color: var(--muted); display: inline-block; min-width: 76px; }

.form { padding: 34px; border-radius: var(--radius-lg); background: var(--paper-2); box-shadow: inset 0 0 0 1px var(--line); }
.form h4 { font-size: 16px; margin-bottom: 6px; }
.form__tip { font-size: 12px; color: var(--muted); margin-bottom: 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 7px; }
.field label i { font-style: normal; color: var(--accent); }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border-radius: 8px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); transition: border-color .25s, box-shadow .25s;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(235, 118, 126, .14);
}
.form__status { margin-top: 14px; font-size: 13px; min-height: 20px; }
.form__status.is-ok { color: #1F9E78; }
.form__status.is-err { color: #C0392B; }
.form .btn { margin-top: 6px; }

/* ---------- 页脚 ---------- */
.footer { padding: 44px 0 36px; background: var(--navy-3); color: rgba(255, 255, 255, .5); }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.footer__brand { font-size: 15px; font-weight: 700; letter-spacing: .3em; color: #fff; }
.footer__social { display: flex; gap: 8px; }
.footer__social a {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  color: rgba(255, 255, 255, .58); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .16);
  transition: .3s var(--ease);
}
.footer__social a:hover { background: #fff; color: var(--navy); box-shadow: none; }
.footer__social svg { width: 14px; height: 14px; }
.footer__copy { font-size: 12.5px; }

/* ---------- 回到顶部 ---------- */
.totop {
  position: fixed; right: 22px; bottom: 22px; z-index: 80;
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  background: var(--navy); color: #fff; box-shadow: var(--shadow-m);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: .35s var(--ease);
}
.totop.is-on { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--accent); transform: translateY(-3px); }
.totop svg { width: 17px; height: 17px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .about__grid { grid-template-columns: 1fr; gap: 40px; }
  .contact__grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 860px) {
  .section { padding: 70px 0; }
  .hero__tiles { grid-template-columns: repeat(2, 1fr); }
  .strip { margin-bottom: 40px; }
  .strip__nav { display: none; }        /* 小屏改用左右滑动 */
  .strip__frame { border-radius: var(--radius); }
  .nav__menu {
    position: fixed; inset: 0 0 auto 0; top: 0; padding: 84px 22px 26px;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: var(--navy); box-shadow: var(--shadow-l);
    transform: translateY(-100%); transition: transform .45s var(--ease);
  }
  .nav__menu.is-open { transform: none; }
  .nav__menu a { color: #fff !important; font-size: 15px; padding: 14px 8px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .nav__menu a::after { display: none; }
  .nav__burger { display: block; position: relative; z-index: 2; color: #fff; }
  .nav.is-solid .nav__burger { color: var(--ink); }
  .nav__menu.is-open ~ .nav__side .nav__burger, .nav__burger.is-open { color: #fff; }
  .step { grid-template-columns: 1fr; gap: 18px; padding: 26px; }
}
@media (max-width: 620px) {
  :root { --pad: 16px; }
  .grid { grid-template-columns: 1fr; }
  .hero__tiles { grid-template-columns: 1fr; }
  .strip { margin-bottom: 32px; }
  .strip__dots { gap: 5px; bottom: 11px; }
  .strip__dots button { width: 6px; height: 6px; }
  .strip__dots button.is-on { width: 16px; }
  .strip__count { font-size: 10px; right: 12px; bottom: 9px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .viewer__nav { width: 42px; height: 42px; }
  .viewer__nav--prev { left: 8px; }
  .viewer__nav--next { right: 8px; }
  .viewer__strip button { width: 74px; height: 48px; }
  .form { padding: 24px; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .nav, .totop, .viewer, #preloader, .hero__scroll { display: none !important; }
  body { color: #000; }
}