/* ============================================================
   四川成榕信息技术有限公司 — 静态官网
   设计语言：工业蓝图 × 科技蓝 × 宋体文气 · 琥珀点睛
   ============================================================ */
:root {
  --ink: #08131f;          /* 工业夜色 */
  --ink-2: #0c2336;        /* 深海蓝 */
  --steel: #2d7fbc;        /* 品牌钢蓝（取自LOGO） */
  --sky: #7fb8e0;          /* 冰蓝 */
  --ice: #eef5fb;          /* 浅色底 */
  --paper: #ffffff;
  --amber: #e0a458;        /* 火焰琥珀 */
  --tx: #45566a;
  --tx-dark: #14263a;
  --line: #dce7f1;
  --serif: "Songti SC", "STSong", "STZhongsong", "SimSun", serif;
  --sans: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(.22, .8, .3, 1);
  --shadow: 0 18px 50px rgba(8, 32, 56, .14);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); font-size: 15px; line-height: 1.9; color: var(--tx); background: var(--paper); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .3s, transform .3s, background .3s, border-color .3s; }
figure { margin: 0; }
.container { width: 1200px; max-width: calc(100% - 48px); margin: 0 auto; }
::selection { background: rgba(45, 127, 188, .25); }

/* ---------- 通用标题 ---------- */
.section { padding: 96px 0; position: relative; }
.sec-head { text-align: center; margin-bottom: 60px; position: relative; z-index: 2; }
.sec-head .en {
  font-family: var(--serif); font-style: italic; font-size: 17px; letter-spacing: .5em;
  color: var(--steel); opacity: .55; text-transform: capitalize;
}
.sec-head .tit {
  font-family: var(--serif); font-size: 38px; font-weight: 700; letter-spacing: .18em;
  color: var(--tx-dark); margin: 10px 0 12px;
}
.sec-head .des { font-size: 15px; letter-spacing: .08em; }
.sec-head.light .en { color: var(--sky); opacity: .7; }
.sec-head.light .tit { color: #f4f9fd; }
.sec-head.light .des { color: rgba(228, 240, 250, .6); }
.sec-head::after {
  content: ""; display: block; width: 56px; height: 2px; margin: 22px auto 0;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
}

/* ---------- 蓝图网格母题 ---------- */
.blueprint {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(45, 127, 188, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 127, 188, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
}

/* ---------- 图片统一动画容器 ---------- */
.ph { position: relative; overflow: hidden; border-radius: 10px; background: var(--ink-2); }
.ph img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease), filter .6s; }
.ph::after {
  content: ""; position: absolute; top: 0; left: -80%; width: 55%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, .28), transparent);
  transform: skewX(-18deg); transition: left .9s var(--ease); pointer-events: none;
}
.ph:hover img { transform: scale(1.07); }
.ph:hover::after { left: 130%; }
.ph figcaption, .ph + .h3 { font-size: 12.5px; }

.bigph { background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); transition: transform .5s var(--ease), box-shadow .5s; }
.bigph img { width: 100%; object-fit: contain; transition: transform .8s var(--ease); }
.bigph:hover { transform: translateY(-6px); box-shadow: 0 26px 60px rgba(8, 32, 56, .2); }
.bigph:hover img { transform: scale(1.025); }
.bigph figcaption {
  text-align: center; padding: 14px; font-family: var(--serif); letter-spacing: .2em;
  color: var(--tx-dark); border-top: 1px solid var(--line); background: var(--ice); font-weight: 700;
}

/* ============================================================
   Header
   ============================================================ */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(8, 19, 31, .78); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(127, 184, 224, .14);
}
.header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent 10%, rgba(224, 164, 88, .55) 50%, transparent 90%);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 44px; width: auto; filter: drop-shadow(0 0 12px rgba(127, 184, 224, .45)); }
.logo-txt { display: flex; flex-direction: column; line-height: 1.3; }
.logo-txt b { font-family: var(--serif); color: #f4f9fd; font-size: 19px; letter-spacing: .3em; }
.logo-txt i { font-style: normal; font-size: 9.5px; letter-spacing: .32em; color: var(--sky); opacity: .8; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav > a, .nav-drop > a {
  display: block; padding: 9px 15px; color: rgba(228, 240, 250, .82); font-size: 14.5px;
  letter-spacing: .06em; position: relative;
}
.nav > a:hover, .nav > a.on, .nav-drop > a:hover { color: #fff; }
.nav > a::after, .nav-drop > a::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px; height: 2px;
  background: var(--amber); border-radius: 2px; transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav > a:hover::after, .nav > a.on::after, .nav-drop > a:hover::after { transform: scaleX(1); }
.caret {
  display: inline-block; width: 6px; height: 6px; margin-left: 7px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-3px); transition: transform .3s;
}
.nav-drop { position: relative; }
.drop-panel {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 14px);
  background: rgba(10, 30, 50, .96); backdrop-filter: blur(14px); min-width: 236px;
  border: 1px solid rgba(127, 184, 224, .18); border-radius: 10px; padding: 10px 0;
  opacity: 0; visibility: hidden; transition: all .35s var(--ease);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .4);
}
.drop-panel::before { content: ""; position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; background: inherit; border-left: 1px solid rgba(127,184,224,.18); border-top: 1px solid rgba(127,184,224,.18); transform: translateX(-50%) rotate(45deg); }
.nav-drop:hover .drop-panel { opacity: 1; visibility: visible; transform: translate(-50%, 6px); }
.nav-drop:hover .caret { transform: rotate(225deg) translateY(-2px); }
.drop-panel a { display: block; padding: 11px 24px; color: rgba(228, 240, 250, .8); font-size: 13.5px; white-space: nowrap; }
.drop-panel a:hover { color: var(--amber); padding-left: 30px; background: rgba(127, 184, 224, .08); }

/* 移动端菜单 */
.burger { display: none; width: 42px; height: 42px; cursor: pointer; position: relative; z-index: 130; }
.burger span {
  position: absolute; left: 9px; right: 9px; height: 2px; background: #eaf3fa;
  border-radius: 2px; transition: all .35s var(--ease);
}
.burger span:nth-child(1) { top: 13px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 27px; }
#navToggle:checked ~ .header .burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
#navToggle:checked ~ .header .burger span:nth-child(2) { opacity: 0; }
#navToggle:checked ~ .header .burger span:nth-child(3) { top: 20px; transform: rotate(-45deg); }
.m-nav {
  position: fixed; top: 74px; left: 0; right: 0; z-index: 99; padding: 10px 20px 22px;
  background: rgba(8, 19, 31, .97); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(127, 184, 224, .16);
  transform: translateY(-115%); transition: transform .45s var(--ease);
}
#navToggle:checked ~ .m-nav { transform: translateY(0); }
.m-nav a {
  display: block; padding: 13px 8px; color: rgba(228, 240, 250, .85);
  border-bottom: 1px dashed rgba(127, 184, 224, .16); font-size: 15px; letter-spacing: .1em;
}
.m-nav a:last-child { border-bottom: 0; }
.m-nav a:hover { color: var(--amber); padding-left: 14px; }

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; min-height: 100vh; background: var(--ink); overflow: hidden; display: flex; flex-direction: column; justify-content: center; }
.hero-bg {
  position: absolute; inset: 0;
  background: url("../images/hero-bg.webp") center 38% / cover no-repeat;
  animation: kenburns 22s var(--ease) infinite alternate;
}
@keyframes kenburns { from { transform: scale(1); } to { transform: scale(1.12); } }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(100deg, rgba(8, 19, 31, .93) 26%, rgba(10, 32, 54, .66) 55%, rgba(13, 45, 76, .3) 82%),
    linear-gradient(0deg, rgba(8, 19, 31, .9) 0%, transparent 30%);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 1; opacity: .6;
  background-image:
    linear-gradient(rgba(127, 184, 224, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 184, 224, .06) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 85% 80% at 70% 40%, #000 20%, transparent 72%);
  mask-image: radial-gradient(ellipse 85% 80% at 70% 40%, #000 20%, transparent 72%);
}
.hero-inner { position: relative; z-index: 3; padding: 150px 0 200px; }
.hero-en {
  font-family: var(--serif); font-style: italic; color: rgba(127, 184, 224, .75);
  letter-spacing: .42em; font-size: 13px; margin-bottom: 26px;
  animation: riseIn 1.1s var(--ease) .15s both;
}
.hero h1 {
  font-family: var(--serif); color: #f7fafc; font-size: 74px; font-weight: 700;
  letter-spacing: .16em; line-height: 1.25; margin-bottom: 20px;
  animation: riseIn 1.1s var(--ease) .3s both;
  text-shadow: 0 6px 40px rgba(0, 0, 0, .45);
}
.hero h1 .dot { color: var(--amber); }
.hero-sub {
  color: var(--sky); font-size: 21px; letter-spacing: .28em; margin-bottom: 18px;
  animation: riseIn 1.1s var(--ease) .45s both;
}
.hero-line {
  color: rgba(228, 240, 250, .68); max-width: 620px; font-size: 15.5px; letter-spacing: .04em;
  border-left: 2px solid var(--amber); padding-left: 18px;
  animation: riseIn 1.1s var(--ease) .6s both;
}
.hero-btns { margin-top: 44px; display: flex; gap: 16px; animation: riseIn 1.1s var(--ease) .75s both; }
.btn {
  display: inline-block; padding: 14px 42px; font-size: 15px; letter-spacing: .24em;
  border: 1px solid transparent; border-radius: 3px; position: relative; overflow: hidden;
}
.btn.solid { background: linear-gradient(120deg, var(--steel), #1c5e94); color: #fff; box-shadow: 0 10px 30px rgba(45, 127, 188, .35); }
.btn.solid::after {
  content: ""; position: absolute; top: 0; left: -80%; width: 50%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, .35), transparent);
  transform: skewX(-20deg); transition: left .7s var(--ease);
}
.btn.solid:hover::after { left: 140%; }
.btn.solid:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(45, 127, 188, .5); }
.btn.ghost { border-color: rgba(228, 240, 250, .45); color: #eaf3fa; }
.btn.ghost:hover { border-color: var(--amber); color: var(--amber); background: rgba(224, 164, 88, .08); }
.hero-vert {
  position: absolute; right: 46px; top: 50%; transform: translateY(-58%); z-index: 3;
  writing-mode: vertical-rl; font-family: var(--serif); font-size: 19px; letter-spacing: .85em;
  color: rgba(228, 240, 250, .5); border-right: 1px solid rgba(224, 164, 88, .4); padding-right: 16px;
  animation: fadein 1.6s var(--ease) 1s both;
}
@keyframes riseIn { from { opacity: 0; transform: translateY(34px); } to { opacity: 1; transform: none; } }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.hero-stats {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 4;
  background: rgba(8, 19, 31, .72); backdrop-filter: blur(10px);
  border-top: 1px solid rgba(127, 184, 224, .18);
  animation: fadein 1.4s var(--ease) 1s both;
}
.hero-stats-inner { display: flex; }
.hero-stats .item { flex: 1; text-align: center; padding: 24px 8px 20px; border-left: 1px solid rgba(127, 184, 224, .14); position: relative; }
.hero-stats .item:first-child { border-left: 0; }
.hero-stats .item::before {
  content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px; background: var(--amber); transition: width .5s var(--ease);
}
.hero-stats .item:hover::before { width: 44px; }
.hero-stats .num {
  font-family: var(--serif); color: #f7fafc; font-size: 32px; font-weight: 700; letter-spacing: .05em;
}
.hero-stats .num i { font-style: normal; font-size: 16px; color: var(--sky); margin-left: 3px; }
.hero-stats .txt { color: rgba(228, 240, 250, .55); font-size: 12.5px; letter-spacing: .12em; margin-top: 2px; }

/* ============================================================
   关于我们（浅）
   ============================================================ */
.about { background: var(--paper); }
.about-wrap { display: grid; grid-template-columns: 1.12fr .88fr; gap: 56px; align-items: start; position: relative; z-index: 2; }
.about-txt p { margin-bottom: 16px; text-align: justify; font-size: 14.5px; }
.about-txt p::first-letter { font-family: var(--serif); font-size: 1.15em; color: var(--steel); }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.about-tags span {
  padding: 10px 24px; background: var(--ice); color: var(--steel); border: 1px solid #cfe2f3;
  border-radius: 3px; font-size: 13.5px; font-weight: 600; letter-spacing: .14em;
  position: relative; transition: all .35s var(--ease);
}
.about-tags span::before {
  content: ""; position: absolute; top: 3px; left: 3px; width: 7px; height: 7px;
  border-top: 1.5px solid var(--amber); border-left: 1.5px solid var(--amber); opacity: 0; transition: opacity .3s;
}
.about-tags span:hover { background: var(--ink-2); color: var(--sky); border-color: var(--ink-2); transform: translateY(-3px); }
.about-tags span:hover::before { opacity: 1; }
.about-imgs { display: grid; gap: 18px; }
.about-imgs .ph { box-shadow: var(--shadow); }
.about-imgs .ph:first-child img { height: 250px; }
.about-imgs .ph:last-child img { height: 205px; }
.about-imgs figcaption {
  position: absolute; left: 0; bottom: 0; z-index: 2; padding: 26px 18px 10px; width: 100%;
  font-family: var(--serif); letter-spacing: .35em; color: rgba(244, 249, 253, .92); font-size: 13px;
  background: linear-gradient(transparent, rgba(8, 19, 31, .78));
}
.about-flow {
  margin-top: 76px; background: var(--ice); border-radius: 14px; padding: 50px 44px;
  border: 1px solid var(--line); position: relative; z-index: 2;
}
.about-flow::before {
  content: ""; position: absolute; top: 14px; left: 14px; right: 14px; bottom: 14px;
  border: 1px dashed rgba(45, 127, 188, .22); border-radius: 9px; pointer-events: none;
}
.flow-tit {
  text-align: center; font-family: var(--serif); font-size: 26px; color: var(--tx-dark);
  letter-spacing: .5em; margin-bottom: 34px; font-weight: 700;
}
.flow-list { display: flex; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.flow-item {
  padding: 10px 30px; color: var(--steel); font-weight: 600; font-size: 16px; letter-spacing: .12em;
  position: relative;
}
.flow-item:not(:last-child)::after {
  content: ""; position: absolute; right: -6px; top: 50%; width: 8px; height: 8px;
  border-top: 2px solid var(--amber); border-right: 2px solid var(--amber);
  transform: translateY(-50%) rotate(45deg);
}
.serve-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.serve-item {
  background: #fff; border-radius: 8px; padding: 24px 26px; border: 1px solid var(--line);
  transition: all .4s var(--ease); position: relative; overflow: hidden;
}
.serve-item::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--steel), var(--amber)); transform: scaleX(0);
  transform-origin: left; transition: transform .5s var(--ease);
}
.serve-item:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.serve-item:hover::before { transform: scaleX(1); }
.serve-item .h3 { color: var(--tx-dark); font-size: 16px; font-weight: 700; margin-bottom: 6px; padding-left: 14px; position: relative; letter-spacing: .08em; }
.serve-item .h3::before {
  content: ""; position: absolute; left: 0; top: 7px; bottom: 7px; width: 4px; border-radius: 2px;
  background: linear-gradient(var(--steel), var(--amber));
}
.serve-item p { font-size: 13.5px; }

/* ============================================================
   解决方案（深）
   ============================================================ */
.solutions { background: linear-gradient(178deg, var(--ink) 0%, var(--ink-2) 100%); }
.sol-block {
  display: grid; grid-template-columns: .92fr 1.08fr; gap: 48px; align-items: center;
  padding: 46px; border-radius: 16px; margin-bottom: 36px;
  background: rgba(255, 255, 255, .035); border: 1px solid rgba(127, 184, 224, .14);
  position: relative; overflow: hidden;
}
.sol-block::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(224, 164, 88, .6), transparent);
}
.sol-block:last-of-type { margin-bottom: 0; }
.sol-block.flip { grid-template-columns: 1.08fr .92fr; }
.sol-block.flip .sol-info { order: 2; }
.sol-block.flip .sol-img { order: 1; }
.sol-tag {
  display: inline-block; font-size: 12.5px; letter-spacing: .3em; color: var(--sky);
  border: 1px solid rgba(127, 184, 224, .4); padding: 5px 18px; border-radius: 2px; margin-bottom: 16px;
  position: relative;
}
.sol-tag::before {
  content: ""; position: absolute; top: 2px; left: 2px; width: 8px; height: 8px;
  border-top: 1.5px solid var(--amber); border-left: 1.5px solid var(--amber);
}
.sol-info h3 {
  color: #f4f9fd; font-family: var(--serif); font-size: 27px; font-weight: 700;
  letter-spacing: .12em; margin-bottom: 14px;
}
.sol-info > p { color: rgba(228, 240, 250, .6); font-size: 14px; text-align: justify; margin-bottom: 16px; }
.sol-feats li { list-style: none; padding: 10px 0 10px 20px; border-bottom: 1px dashed rgba(127, 184, 224, .16); position: relative; }
.sol-feats li:last-child { border-bottom: 0; }
.sol-feats li::before {
  content: ""; position: absolute; left: 0; top: 19px; width: 8px; height: 8px;
  border: 1.5px solid var(--amber); transform: rotate(45deg);
}
.sol-feats b { display: block; color: #f4f9fd; font-size: 15px; font-weight: 600; letter-spacing: .04em; }
.sol-feats span { color: rgba(228, 240, 250, .5); font-size: 12.8px; line-height: 1.75; }
.sol-img { min-width: 0; }
.sol-img .ph { background: #fff; box-shadow: 0 24px 60px rgba(0, 0, 0, .35); }
.sol-img .ph img { object-fit: contain; padding: 10px; background: #fff; }
.sol-img.grid4 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sol-img.grid4 .ph img { height: 150px; padding: 0; object-fit: cover; }
.sol-img.duo { display: grid; gap: 12px; }
.sol-img.duo .ph:first-child img { height: auto; }
.sol-img.duo .ph:last-child img { height: 215px; }
.iiot-apps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 4px; }
.app-card {
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(127, 184, 224, .14);
  border-radius: 12px; overflow: hidden; transition: all .4s var(--ease);
}
.app-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .07); border-color: rgba(224, 164, 88, .4); }
.app-card .ph { border-radius: 0; background: var(--ink-2); }
.app-card .ph img { height: 185px; }
.app-card .h3 { color: #f4f9fd; font-family: var(--serif); font-size: 17px; font-weight: 700; letter-spacing: .2em; padding: 16px 18px 2px; }
.app-card p { color: rgba(228, 240, 250, .52); font-size: 13px; padding: 0 18px 16px; }

/* ============================================================
   数字化（浅）
   ============================================================ */
.digital { background: var(--paper); }
.dig-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 46px; position: relative; z-index: 2; }
.dig-item {
  background: var(--ice); border-radius: 12px; padding: 32px 26px; border: 1px solid var(--line);
  transition: all .4s var(--ease); position: relative; overflow: hidden;
}
.dig-item::before {
  content: ""; position: absolute; top: 0; right: 0; width: 64px; height: 64px;
  background: radial-gradient(circle at top right, rgba(224, 164, 88, .18), transparent 70%);
}
.dig-item:hover { transform: translateY(-7px); box-shadow: var(--shadow); background: #fff; border-color: #bcd8ef; }
.dig-item .glyph {
  width: 14px; height: 14px; margin-bottom: 20px; position: relative;
  border: 1.5px solid var(--steel); transform: rotate(45deg); transition: all .5s var(--ease);
}
.dig-item .glyph::before {
  content: ""; position: absolute; inset: 3px; background: var(--amber); opacity: 0; transition: opacity .4s;
}
.dig-item:hover .glyph { transform: rotate(225deg); border-color: var(--amber); box-shadow: 0 0 18px rgba(224, 164, 88, .5); }
.dig-item:hover .glyph::before { opacity: 1; }
.dig-item .h3 { font-family: var(--serif); font-size: 19px; color: var(--tx-dark); font-weight: 700; letter-spacing: .14em; margin-bottom: 8px; }
.dig-item p { font-size: 13.5px; }
.dig-imgs { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; position: relative; z-index: 2; }
.dig-imgs .bigph img { height: 330px; padding: 14px; }

/* ============================================================
   智能化场景（浅灰蓝）
   ============================================================ */
.scenes { background: var(--ice); }
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scene-item {
  background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid var(--line);
  transition: all .4s var(--ease); position: relative;
}
.scene-item:hover { transform: translateY(-7px); box-shadow: var(--shadow); }
.scene-item .img { height: 195px; overflow: hidden; background: var(--ink-2); position: relative; }
.scene-item .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.scene-item:hover .img img { transform: scale(1.08); }
.scene-item .img::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--steel), var(--amber)); transform: scaleX(0);
  transform-origin: left; transition: transform .55s var(--ease);
}
.scene-item:hover .img::after { transform: scaleX(1); }
.scene-item figcaption { padding: 16px 18px 18px; }
.scene-item b {
  display: block; font-family: var(--serif); color: var(--tx-dark); font-size: 17px;
  letter-spacing: .16em; margin-bottom: 4px;
}
.scene-item span { font-size: 13px; }

/* ============================================================
   经典案例（深）
   ============================================================ */
.cases { background: linear-gradient(180deg, var(--ink-2), var(--ink)); }
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-item {
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(127, 184, 224, .14);
  border-radius: 12px; overflow: hidden; transition: all .4s var(--ease);
}
.case-item:hover { transform: translateY(-7px); background: rgba(255, 255, 255, .07); border-color: rgba(224, 164, 88, .45); }
.case-item .img { height: 178px; overflow: hidden; }
.case-item .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease), filter .6s; filter: saturate(.85); }
.case-item:hover .img img { transform: scale(1.09); filter: saturate(1.1); }
.case-item figcaption { padding: 16px 18px 18px; }
.case-item b {
  display: block; color: #f4f9fd; font-family: var(--serif); font-size: 17px;
  letter-spacing: .2em; margin-bottom: 4px;
}
.case-item span { color: rgba(228, 240, 250, .52); font-size: 12.8px; }

/* ============================================================
   合作伙伴（浅）
   ============================================================ */
.partners { background: var(--paper); }
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; z-index: 2; }
.partner-item {
  border: 1px solid var(--line); border-radius: 10px; text-align: center; padding: 30px 16px;
  background: var(--ice); transition: all .4s var(--ease); position: relative; overflow: hidden;
}
.partner-item::after {
  content: ""; position: absolute; right: -22px; bottom: -22px; width: 64px; height: 64px;
  border: 1.5px solid rgba(45, 127, 188, .25); transform: rotate(45deg); transition: all .4s var(--ease);
}
.partner-item:hover { border-color: var(--steel); background: #fff; box-shadow: var(--shadow); transform: translateY(-4px); }
.partner-item:hover::after { border-color: var(--amber); right: -14px; bottom: -14px; }
.partner-item .h3 { font-family: var(--serif); font-size: 21px; color: var(--tx-dark); font-weight: 700; letter-spacing: .12em; }
.partner-item.major {
  background: linear-gradient(135deg, var(--steel) 0%, #17527e 100%); border-color: transparent;
  box-shadow: 0 14px 36px rgba(45, 127, 188, .35);
}
.partner-item.major .h3 { color: #fff; }
.partner-item.major p { color: rgba(244, 249, 253, .78); font-size: 13px; margin-top: 6px; letter-spacing: .1em; }
.pano-card {
  margin-top: 60px; background: var(--ice); border-radius: 14px; padding: 50px 44px;
  border: 1px solid var(--line); position: relative; z-index: 2;
}
.pano-tit { text-align: center; font-family: var(--serif); font-size: 26px; color: var(--tx-dark); font-weight: 700; letter-spacing: .3em; }
.pano-des { text-align: center; color: var(--tx); font-size: 14px; margin: 10px 0 34px; letter-spacing: .1em; }

/* ============================================================
   资质（浅蓝）
   ============================================================ */
.certs { background: var(--ice); }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 42px; }
.cert-item {
  background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px;
  display: flex; align-items: center; gap: 12px; transition: all .35s var(--ease); position: relative;
}
.cert-item::before {
  content: ""; width: 11px; height: 11px; flex: 0 0 11px; transform: rotate(45deg);
  border: 1.5px solid var(--steel); transition: all .35s var(--ease);
}
.cert-item:hover { border-color: var(--steel); transform: translateY(-3px); box-shadow: var(--shadow); }
.cert-item:hover::before { background: var(--amber); border-color: var(--amber); }
.cert-item span { font-size: 14px; color: var(--tx-dark); font-weight: 600; }
.cert-imgs { display: grid; grid-template-columns: 1.35fr .65fr; gap: 20px; align-items: start; }

/* ============================================================
   部分业绩（深）
   ============================================================ */
.achieve { background: linear-gradient(180deg, var(--ink), var(--ink-2)); }
.fw-box {
  border: 1px solid rgba(127, 184, 224, .16); border-radius: 14px; padding: 36px;
  background: rgba(255, 255, 255, .035); margin-bottom: 36px; position: relative;
}
.fw-box::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(224, 164, 88, .6), transparent);
}
.fw-tit { color: #f4f9fd; font-family: var(--serif); font-size: 21px; font-weight: 700; margin-bottom: 24px; letter-spacing: .3em; }
.fw-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 24px; }
.fw-item { background: #fff; border-radius: 10px; overflow: hidden; transition: all .4s var(--ease); }
.fw-item:hover { transform: translateY(-5px); box-shadow: 0 20px 44px rgba(0, 0, 0, .4); }
.fw-item .img { height: 172px; overflow: hidden; }
.fw-item .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.fw-item:hover .img img { transform: scale(1.08); }
.fw-item figcaption {
  text-align: center; padding: 12px; font-weight: 600; color: var(--tx-dark);
  font-size: 14px; letter-spacing: .1em;
}
.fw-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.fw-tags span {
  padding: 8px 20px; border: 1px solid rgba(127, 184, 224, .4); color: var(--sky);
  border-radius: 2px; font-size: 13.5px; letter-spacing: .08em; transition: all .35s;
}
.fw-tags span:hover { border-color: var(--amber); color: var(--amber); }
.ach-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.ach-col {
  background: rgba(255, 255, 255, .035); border: 1px solid rgba(127, 184, 224, .14);
  border-radius: 14px; padding: 30px; transition: all .4s var(--ease);
}
.ach-col:hover { border-color: rgba(224, 164, 88, .35); }
.ach-tit {
  color: var(--sky); font-family: var(--serif); font-size: 18px; font-weight: 700;
  margin-bottom: 16px; padding-bottom: 12px; letter-spacing: .2em;
  border-bottom: 1px solid rgba(127, 184, 224, .16); position: relative;
}
.ach-tit::after {
  content: ""; position: absolute; left: 0; bottom: -1px; width: 42px; height: 2px; background: var(--amber);
}
.ach-col a {
  display: block; color: rgba(228, 240, 250, .6); font-size: 13.5px; line-height: 1.7;
  padding: 7px 0 7px 18px; position: relative;
}
.ach-col a::before {
  content: ""; position: absolute; left: 0; top: 17px; width: 6px; height: 6px;
  border: 1px solid rgba(224, 164, 88, .7); transform: rotate(45deg);
}
.ach-col a:hover { color: #fff; transform: translateX(5px); }

/* ============================================================
   CTA
   ============================================================ */
.com-cta { position: relative; padding: 120px 0; overflow: hidden; background: var(--ink); }
.cta-bg { position: absolute; inset: 0; background: url("../images/cta-bg.webp") center / cover no-repeat; opacity: .4; animation: kenburns 26s var(--ease) infinite alternate; }
.cta-veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8, 19, 31, .82), rgba(8, 19, 31, .55) 50%, rgba(8, 19, 31, .88)); }
.cta-inner { position: relative; z-index: 2; text-align: center; }
.cta-inner .tit {
  color: #f7fafc; font-family: var(--serif); font-size: 34px; font-weight: 700;
  letter-spacing: .22em; margin-bottom: 14px;
}
.cta-inner .des { color: rgba(228, 240, 250, .62); margin-bottom: 46px; letter-spacing: .1em; }

/* 电话徽章：蓝图边角 + 琥珀脉动 */
.phone-badge {
  position: relative; display: inline-flex; align-items: center; gap: 26px;
  padding: 28px 52px; border: 1px solid rgba(127, 184, 224, .3); border-radius: 4px;
  background: rgba(8, 19, 31, .45); backdrop-filter: blur(6px);
  transition: all .45s var(--ease);
}
.phone-badge::before, .phone-badge::after,
.ph-txt::before, .ph-txt::after {
  content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none;
  transition: border-color .45s;
}
.phone-badge::before { top: -1px; left: -1px; border-top: 2px solid var(--amber); border-left: 2px solid var(--amber); }
.phone-badge::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--amber); border-right: 2px solid var(--amber); }
.ph-ring {
  position: relative; width: 74px; height: 74px; flex: 0 0 74px; border-radius: 50%;
  border: 1px solid rgba(224, 164, 88, .55); display: flex; align-items: center; justify-content: center;
}
.ph-ring::before, .ph-ring::after {
  content: ""; position: absolute; inset: -1px; border-radius: 50%;
  border: 1px solid rgba(224, 164, 88, .4); animation: pulse 2.6s var(--ease) infinite;
}
.ph-ring::after { animation-delay: 1.3s; }
@keyframes pulse {
  0% { transform: scale(1); opacity: .8; }
  70%, 100% { transform: scale(1.55); opacity: 0; }
}
.ph-ring svg { width: 30px; height: 30px; fill: #f7fafc; filter: drop-shadow(0 0 8px rgba(224, 164, 88, .6)); }
.ph-txt { text-align: left; display: flex; flex-direction: column; gap: 4px; position: relative; padding: 4px 0; }
.ph-label { color: var(--sky); font-size: 12px; letter-spacing: .5em; }
.ph-num {
  font-family: var(--serif); color: #f7fafc; font-size: 42px; font-weight: 700;
  letter-spacing: .08em; line-height: 1.15; white-space: nowrap;
  text-shadow: 0 0 34px rgba(224, 164, 88, .35);
}
.ph-num em { font-style: normal; color: var(--amber); text-shadow: 0 0 26px rgba(224, 164, 88, .55); }
.phone-badge:hover {
  transform: translateY(-4px); border-color: rgba(224, 164, 88, .65);
  background: rgba(8, 19, 31, .6); box-shadow: 0 18px 50px rgba(0, 0, 0, .45), 0 0 40px rgba(224, 164, 88, .12);
}
.phone-badge:hover .ph-num { text-shadow: 0 0 44px rgba(224, 164, 88, .6); }
.phone-badge:hover::before, .phone-badge:hover::after { width: 22px; height: 22px; }

/* ============================================================
   Footer
   ============================================================ */
.footer { background: #050e17; }
.foot-main { display: grid; grid-template-columns: 1.3fr .8fr .8fr 1.3fr; gap: 36px; padding: 62px 0 46px; }
.logo-row { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.logo-row .logo { height: 42px; width: auto; filter: drop-shadow(0 0 10px rgba(127, 184, 224, .4)); }
.foot-left .name { color: #f4f9fd; font-family: var(--serif); font-size: 16px; letter-spacing: .2em; }
.foot-left .ename { color: rgba(228, 240, 250, .35); font-size: 11.5px; margin-top: 4px; letter-spacing: .05em; }
.foot-col .h3 {
  color: #f4f9fd; font-family: var(--serif); font-size: 15.5px; font-weight: 700;
  margin-bottom: 16px; letter-spacing: .24em; position: relative; padding-bottom: 10px;
}
.foot-col .h3::after { content: ""; position: absolute; left: 0; bottom: 0; width: 26px; height: 2px; background: var(--amber); }
.foot-col a, .foot-col .li { display: block; color: rgba(228, 240, 250, .5); font-size: 13.5px; padding: 5px 0; }
.foot-col a:hover { color: var(--sky); padding-left: 5px; }
.foot-bar { border-top: 1px solid rgba(127, 184, 224, .1); padding: 18px 0; }
.foot-bar .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 6px 18px; color: rgba(228, 240, 250, .32); font-size: 12.5px; text-align: center; letter-spacing: .04em; }
.foot-bar .icp { color: rgba(228, 240, 250, .4); text-decoration: none; border-bottom: 1px solid transparent; transition: color .25s, border-bottom-color .25s; }
.foot-bar .icp:hover { color: rgba(228, 240, 250, .78); border-bottom-color: currentColor; }

/* ============================================================
   滚动渐显（纯CSS，支持的浏览器自动启用，其余直接显示）
   ============================================================ */
@keyframes riseup { from { opacity: 0; transform: translateY(42px); } to { opacity: 1; transform: none; } }
@keyframes wipein { from { clip-path: inset(8% 6% 8% 6% round 12px); } to { clip-path: inset(0 0 0 0 round 12px); } }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      animation: riseup .9s var(--ease) both;
      animation-timeline: view(); animation-range: entry 0% entry 68%;
    }
    .reveal .ph, .reveal .bigph, .scene-item .img, .case-item .img, .fw-item .img {
      animation: wipein 1.1s var(--ease) both;
      animation-timeline: view(); animation-range: entry 0% entry 70%;
    }
  }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .hero h1 { font-size: 54px; }
  .hero-vert { display: none; }
  .about-wrap { grid-template-columns: 1fr; gap: 36px; }
  .sol-block, .sol-block.flip { grid-template-columns: 1fr; gap: 28px; padding: 34px; }
  .sol-block.flip .sol-info { order: 1; }
  .sol-block.flip .sol-img { order: 2; }
  .dig-grid, .scene-grid, .case-grid, .partner-grid, .cert-grid, .fw-grid { grid-template-columns: repeat(2, 1fr); }
  .serve-grid, .ach-list { grid-template-columns: 1fr 1fr; }
  .dig-imgs, .cert-imgs { grid-template-columns: 1fr; }
  .iiot-apps { grid-template-columns: repeat(3, 1fr); }
  .foot-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 14px; }
  .nav { display: none; }
  .burger { display: block; }
  .header-inner { height: 66px; }
  .logo img { height: 38px; }
  .logo-txt b { font-size: 16px; letter-spacing: .2em; }
  .m-nav { top: 66px; }

  .hero { min-height: auto; display: block; }
  .hero-inner { padding: 120px 0 46px; }
  .hero h1 { font-size: 38px; letter-spacing: .12em; }
  .hero-sub { font-size: 16px; letter-spacing: .18em; }
  .hero-line { font-size: 13.5px; }
  .hero-btns { margin-top: 30px; }
  .btn { padding: 12px 30px; font-size: 13.5px; }
  .hero-bg { background-position: center 30%; }
  .hero-band { display: block !important; }
  .hero-stats { position: static; }
  .hero-stats-inner { flex-wrap: wrap; }
  .hero-stats .item { flex: 1 1 50%; border-top: 1px solid rgba(127, 184, 224, .12); }

  .section { padding: 62px 0; }
  .sec-head { margin-bottom: 40px; }
  .sec-head .tit { font-size: 27px; letter-spacing: .14em; }
  .sec-head .en { font-size: 13px; letter-spacing: .4em; }
  .flow-tit, .pano-tit { font-size: 20px; letter-spacing: .3em; }
  .flow-item { padding: 8px 16px; font-size: 14px; }
  .serve-grid, .scene-grid, .case-grid, .partner-grid, .cert-grid, .fw-grid,
  .dig-grid, .ach-list, .iiot-apps, .foot-main, .sol-img.grid4 { grid-template-columns: 1fr; }
  .about-flow { padding: 36px 22px; }
  .sol-block, .sol-block.flip { padding: 26px 20px; }
  .pano-card { padding: 36px 20px; }
  .fw-box { padding: 26px 20px; }
  .cta-inner .tit { font-size: 24px; letter-spacing: .14em; }
  .com-cta { padding: 80px 0; }
  .phone-badge { padding: 18px 22px; gap: 16px; }
  .ph-ring { width: 54px; height: 54px; flex-basis: 54px; }
  .ph-ring svg { width: 22px; height: 22px; }
  .ph-num { font-size: 26px; }
  .ph-label { font-size: 10.5px; letter-spacing: .32em; }
  .cta-inner .des { margin-bottom: 34px; }

  /* 移动端隐藏小字架构图（图片显示不全/不可读） */
  .dig-imgs, .cert-imgs, .pano-card,
  #sol-oilgas .sol-img, #sol-iiot .sol-img, #sol-safety .sol-img .ph:first-child { display: none; }
  .dig-grid { margin-bottom: 0; }
  /* 方案块去掉图后补足留白节奏 */
  #sol-oilgas .sol-block::after, #sol-iiot .sol-block::after { content: none; }
  .sol-img.duo { display: block; }
  .sol-img.duo .ph { margin-top: 12px; }
  .scene-item .img, .case-item .img, .app-card .ph img { height: 200px; }
  .hero-stats .num { font-size: 26px; }
}

/* 移动端 Hero 蓝图横幅（PC隐藏） */
.hero-band { display: none; }

/* ---------- 无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }