/* ==========================================================
   四川蜀诚恒环保工程有限公司 · 官网样式
   ========================================================== */
:root {
  --bg: #fafbfa;
  --paper: #ffffff;
  --ink: #1a2622;
  --ink-2: #42544d;
  --muted: #6b7a74;
  --line: #e3eae6;
  --green: #0f5b4e;
  --green-deep: #0b3f36;
  --green-soft: #e7f0ec;
  --gold: #b8935a;
  --shadow: 0 10px 30px rgba(15, 91, 78, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 63, 54, 0.16);
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------------- Header ---------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s ease, box-shadow .3s ease;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  height: 76px; display: flex; align-items: center; gap: 40px;
}
.logo { display: flex; align-items: center; gap: 12px; color: #fff; transition: color .3s; }
.site-header.scrolled .logo { color: var(--green-deep); }
.logo-mark { width: auto; height: 46px; flex: none; }
.logo-text { line-height: 1.25; }
.logo-text .cn { font-size: 17px; font-weight: 700; letter-spacing: 2px; display: block; }
.logo-text .en { font-size: 10px; letter-spacing: .5px; opacity: .75; display: block; text-transform: uppercase; }

.main-nav { display: flex; gap: 8px; margin-left: auto; align-items: center; }
.main-nav a.nav-link {
  padding: 8px 16px; font-size: 15px; color: rgba(255,255,255,.88);
  border-radius: 8px; transition: all .25s; position: relative; white-space: nowrap;
}
.main-nav a.nav-link:hover { color: #fff; background: rgba(255,255,255,.12); }
.main-nav a.nav-link.active { color: #fff; }
.main-nav a.nav-link.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 2px; border-radius: 2px; background: currentColor;
}
.site-header.scrolled .main-nav a.nav-link { color: var(--ink-2); }
.site-header.scrolled .main-nav a.nav-link:hover { color: var(--green); background: var(--green-soft); }
.site-header.scrolled .main-nav a.nav-link.active { color: var(--green); }

.auth-area { display: flex; align-items: center; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; border-radius: 10px; font-size: 15px; padding: 10px 22px;
  transition: all .25s; letter-spacing: 1px;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-deep); box-shadow: var(--shadow); transform: translateY(-1px); }
.btn-ghost-light { background: rgba(255,255,255,.14); color: #fff; border: 1px solid rgba(255,255,255,.5); }
.btn-ghost-light:hover { background: rgba(255,255,255,.26); }
.btn-ghost { background: transparent; color: var(--green); border: 1px solid var(--green); }
.btn-ghost:hover { background: var(--green-soft); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.user-chip { display: flex; align-items: center; gap: 10px; color: #fff; }
.site-header.scrolled .user-chip { color: var(--ink); }
.user-avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--gold);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; flex: none;
}
.user-name { font-size: 14px; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-btn { background: none; border: none; font-size: 14px; color: inherit; opacity: .85; padding: 6px 4px; }
.link-btn:hover { opacity: 1; color: var(--gold); }

.nav-toggle { display: none; background: none; border: none; width: 40px; height: 40px; position: relative; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 8px; right: 8px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { left: 0; right: 0; top: -7px; }
.nav-toggle span::after { left: 0; right: 0; top: 7px; }
.site-header.scrolled .nav-toggle span, .site-header.scrolled .nav-toggle span::before, .site-header.scrolled .nav-toggle span::after { background: var(--ink); }

/* ---------------- Hero ---------------- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; animation: heroZoom 18s ease-out forwards; }
@keyframes heroZoom { from { transform: scale(1.08); } to { transform: scale(1); } }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(8, 38, 33, .82) 0%, rgba(10, 52, 44, .55) 45%, rgba(10, 52, 44, .25) 100%);
}
.hero-content { position: relative; z-index: 2; color: #fff; padding: 120px 0 80px; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 10px; font-size: 14px; letter-spacing: 4px;
  color: rgba(255,255,255,.85); margin-bottom: 26px;
}
.hero-kicker::before { content: ""; width: 40px; height: 1px; background: var(--gold); }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); font-weight: 700; letter-spacing: 6px; line-height: 1.25; }
.hero .sub {
  margin-top: 22px; font-size: clamp(15px, 1.6vw, 19px); color: rgba(255,255,255,.88);
  max-width: 620px; letter-spacing: 1px;
}
.hero-actions { margin-top: 44px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-meta { margin-top: 64px; display: flex; gap: 48px; flex-wrap: wrap; }
.hero-meta .item .num { font-size: 30px; font-weight: 700; font-family: Georgia, serif; }
.hero-meta .item .num i { font-style: normal; color: var(--gold); }
.hero-meta .item .label { font-size: 13px; color: rgba(255,255,255,.7); letter-spacing: 2px; }

/* ---------------- Sections ---------------- */
.section { padding: 96px 0; }
.section.tight { padding: 72px 0; }
.section.alt { background: var(--paper); }
.section-head { margin-bottom: 56px; }
.kicker {
  display: inline-flex; align-items: center; gap: 12px; font-size: 13px;
  letter-spacing: 3px; color: var(--green); font-weight: 600; margin-bottom: 14px;
}
.kicker::before { content: ""; width: 28px; height: 2px; background: var(--gold); }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); letter-spacing: 3px; font-weight: 700; color: var(--ink); }
.section-head p { margin-top: 14px; color: var(--muted); max-width: 640px; }
.section-head.center { text-align: center; }
.section-head.center p { margin-left: auto; margin-right: auto; }
.section-head.center .kicker::before { display: none; }

/* intro split */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.split .media { position: relative; }
.split .media img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }
.split .media .badge {
  position: absolute; left: -24px; bottom: 32px; background: var(--green); color: #fff;
  padding: 18px 24px; border-radius: 12px; box-shadow: var(--shadow-lg); font-size: 13px; line-height: 1.5;
}
.split .media .badge b { display: block; font-size: 22px; letter-spacing: 1px; }
.prose p { color: var(--ink-2); margin-bottom: 16px; text-align: justify; }
.prose .lead { font-size: 17px; color: var(--ink); font-weight: 600; }

/* cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.svc-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; transition: all .3s ease; position: relative; overflow: hidden;
}
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.svc-card .idx {
  font-family: Georgia, serif; font-size: 15px; color: var(--gold); letter-spacing: 2px; margin-bottom: 14px; display: block;
}
.svc-card h3 { font-size: 20px; letter-spacing: 1px; margin-bottom: 12px; color: var(--ink); }
.svc-card p { font-size: 14.5px; color: var(--muted); margin-bottom: 18px; }
.svc-card .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12.5px; color: var(--green); background: var(--green-soft);
  padding: 4px 12px; border-radius: 999px; letter-spacing: .5px;
}
.svc-card::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px;
  border-radius: 50%; background: var(--green-soft); opacity: 0; transition: opacity .3s;
}
.svc-card:hover::after { opacity: .6; }

/* steps */
.step-card { text-align: center; padding: 36px 24px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); transition: all .3s; }
.step-card:hover { border-color: var(--green); box-shadow: var(--shadow); }
.step-card .no {
  width: 56px; height: 56px; margin: 0 auto 20px; border-radius: 50%;
  background: var(--green-soft); color: var(--green); display: flex; align-items: center; justify-content: center;
  font-family: Georgia, serif; font-size: 20px; font-weight: 700;
}
.step-card h3 { font-size: 18px; margin-bottom: 10px; letter-spacing: 1px; }
.step-card p { font-size: 14px; color: var(--muted); }

/* cases */
.case-card { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 340px; display: flex; align-items: flex-end; box-shadow: var(--shadow); }
.case-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.case-card:hover img { transform: scale(1.05); }
.case-card .veil { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(8, 34, 29, .85)); }
.case-card .body { position: relative; z-index: 2; color: #fff; padding: 28px; }
.case-card .tag { font-size: 12px; letter-spacing: 2px; color: var(--gold); margin-bottom: 8px; }
.case-card h3 { font-size: 19px; letter-spacing: 1px; }
.case-card p { font-size: 13.5px; color: rgba(255,255,255,.82); margin-top: 8px; }

/* CTA band */
.cta-band {
  background: linear-gradient(120deg, var(--green-deep), var(--green)); color: #fff;
  border-radius: 20px; padding: 64px 56px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-band h2 { font-size: clamp(22px, 2.6vw, 30px); letter-spacing: 2px; }
.cta-band p { margin-top: 10px; color: rgba(255,255,255,.82); }
.cta-band .btn { background: #fff; color: var(--green-deep); }
.cta-band .btn:hover { background: var(--green-soft); }

/* page banner (subpages) */
.page-banner { position: relative; padding: 170px 0 90px; color: #fff; overflow: hidden; }
.page-banner img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-banner .veil { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(8, 38, 33, .88), rgba(10, 52, 44, .5)); }
.page-banner .inner { position: relative; z-index: 2; }
.page-banner .crumb { font-size: 13px; letter-spacing: 2px; color: rgba(255,255,255,.75); margin-bottom: 12px; }
.page-banner h1 { font-size: clamp(30px, 4vw, 44px); letter-spacing: 4px; }
.page-banner p { margin-top: 14px; color: rgba(255,255,255,.85); max-width: 640px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.info-card { background: var(--green-deep); color: #fff; border-radius: var(--radius); padding: 40px 36px; box-shadow: var(--shadow-lg); }
.info-card h3 { font-size: 20px; letter-spacing: 2px; margin-bottom: 8px; }
.info-card .sub { color: rgba(255,255,255,.7); font-size: 14px; margin-bottom: 28px; }
.info-item { display: flex; gap: 14px; padding: 16px 0; border-top: 1px solid rgba(255,255,255,.14); }
.info-item .ico { width: 40px; height: 40px; flex: none; border-radius: 10px; background: rgba(255,255,255,.1); display: flex; align-items: center; justify-content: center; }
.info-item .ico svg { width: 20px; height: 20px; }
.info-item b { display: block; font-size: 14px; letter-spacing: 1px; margin-bottom: 2px; }
.info-item span { font-size: 14px; color: rgba(255,255,255,.82); }
.info-item a { color: inherit; text-decoration: none; border-bottom: 1px dashed rgba(255,255,255,.35); transition: color .2s, border-color .2s; }
.info-item a:hover { color: #fff; border-bottom-color: rgba(255,255,255,.7); }

.form-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 36px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 8px; letter-spacing: 1px; }
.field label i { color: #c0392b; font-style: normal; margin-left: 2px; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  font-size: 15px; font-family: inherit; background: var(--bg); color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(15, 91, 78, .12); background: #fff;
}
.field textarea { min-height: 130px; resize: vertical; }
.field .err { color: #c0392b; font-size: 13px; margin-top: 6px; display: none; }
.field.invalid input, .field.invalid textarea { border-color: #c0392b; }
.field.invalid .err { display: block; }
.form-tip { font-size: 13px; color: var(--muted); margin-top: 12px; }

/* list rows (留言 / 文件) */
.list-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 30px; margin-top: 40px; }
.list-panel h3 { font-size: 18px; letter-spacing: 1px; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.row-item { display: flex; gap: 16px; align-items: center; padding: 16px 0; border-top: 1px solid var(--line); }
.row-item:first-of-type { border-top: none; }
.row-thumb { width: 52px; height: 52px; border-radius: 10px; background: var(--green-soft); display: flex; align-items: center; justify-content: center; flex: none; overflow: hidden; }
.row-thumb img { width: 100%; height: 100%; object-fit: cover; }
.row-main { flex: 1; min-width: 0; }
.row-main b { display: block; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row-main span { font-size: 13px; color: var(--muted); }
.row-actions { display: flex; gap: 8px; flex: none; }
.mini-btn { font-size: 13px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); border-radius: 8px; padding: 6px 14px; transition: all .2s; }
.mini-btn:hover { border-color: var(--green); color: var(--green); }
.mini-btn.danger:hover { border-color: #c0392b; color: #c0392b; }
.empty-tip { text-align: center; color: var(--muted); font-size: 14px; padding: 32px 0; }

/* login gate */
.gate-panel { max-width: 460px; margin: 60px auto; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 48px 40px; text-align: center; box-shadow: var(--shadow); }
.gate-panel .icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 50%; background: var(--green-soft); display: flex; align-items: center; justify-content: center; }
.gate-panel h2 { font-size: 20px; margin-bottom: 10px; }
.gate-panel p { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

/* ---------------- Footer ---------------- */
.site-footer { background: #0d2925; color: rgba(255,255,255,.82); margin-top: 96px; }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding: 72px 0 48px; }
.footer-main .brand .logo { color: #fff; margin-bottom: 18px; }
.footer-main p { font-size: 13.5px; line-height: 1.9; color: rgba(255,255,255,.6); }
.footer-main h4 { font-size: 15px; letter-spacing: 2px; color: #fff; margin-bottom: 18px; }
.footer-main ul { list-style: none; }
.footer-main li { margin-bottom: 10px; font-size: 13.5px; color: rgba(255,255,255,.65); }
.footer-main li a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 22px 0; font-size: 12.5px; color: rgba(255,255,255,.45); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-bottom a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.22); transition: color .2s, border-color .2s; }
.footer-bottom a:hover { color: rgba(255,255,255,.8); border-bottom-color: rgba(255,255,255,.5); }

/* ---------------- Modal / toast ---------------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 200; background: rgba(10, 30, 26, .55);
  backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-mask.open { display: flex; animation: fadeIn .25s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  width: 100%; max-width: 420px; background: #fff; border-radius: 18px; padding: 40px 36px 32px;
  position: relative; animation: pop .3s ease; max-height: 92vh; overflow-y: auto;
}
@keyframes pop { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }
.modal .close-x { position: absolute; right: 18px; top: 18px; border: none; background: none; font-size: 22px; color: var(--muted); line-height: 1; }
.modal .close-x:hover { color: var(--ink); }
.modal h3 { font-size: 22px; letter-spacing: 2px; text-align: center; }
.modal .modal-sub { text-align: center; color: var(--muted); font-size: 13.5px; margin: 8px 0 26px; }
.otp-row { display: flex; gap: 12px; }
.otp-row .field { flex: 1; margin-bottom: 18px; }
.otp-row .send-btn {
  flex: none; align-self: stretch; margin-bottom: 18px; border: 1px solid var(--green); color: var(--green);
  background: #fff; border-radius: 10px; padding: 0 18px; font-size: 14px; min-width: 118px; transition: all .2s;
}
.otp-row .send-btn:hover:not(:disabled) { background: var(--green-soft); }
.otp-row .send-btn:disabled { border-color: var(--line); color: var(--muted); cursor: not-allowed; }
.divider { display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 12.5px; margin: 22px 0 16px; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.wechat-btn {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 10px;
  border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 11px; font-size: 15px; color: var(--ink-2); transition: all .2s;
}
.wechat-btn:hover { border-color: #2aae67; color: #1f9d5b; background: #f2fbf6; }
.modal .agree-tip { text-align: center; font-size: 12px; color: var(--muted); margin-top: 18px; }

.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%) translateY(20px);
  background: rgba(13, 41, 37, .95); color: #fff; padding: 12px 26px; border-radius: 999px;
  font-size: 14px; letter-spacing: 1px; opacity: 0; pointer-events: none; transition: all .35s ease; z-index: 300;
  max-width: 86vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: rgba(154, 40, 28, .96); }

/* reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* loading skeleton */
.skeleton { background: linear-gradient(90deg, #eef2f0 25%, #f7faf8 50%, #eef2f0 75%); background-size: 200% 100%; animation: sk 1.2s infinite; border-radius: var(--radius); min-height: 220px; }
@keyframes sk { to { background-position: -200% 0; } }

/* ---------------- Responsive ---------------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split .media .badge { left: 16px; }
  .main-nav {
    position: fixed; top: 76px; left: 0; right: 0; background: #fff; flex-direction: column;
    padding: 16px 24px 24px; gap: 4px; align-items: stretch;
    box-shadow: 0 20px 40px rgba(0,0,0,.12); display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a.nav-link { color: var(--ink-2) !important; padding: 12px 8px; }
  .main-nav a.nav-link.active::after { display: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .auth-area { margin-left: 0; }
  .header-inner { gap: 12px; }
  .user-name { display: none; }
}
@media (max-width: 640px) {
  .grid-3, .grid-2, .grid-4, .form-row { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero-meta { gap: 28px; }
  .cta-band { padding: 44px 28px; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; padding: 56px 0 36px; }
  .logo-text .cn { font-size: 15px; }
}

/* ==========================================================
   项目案例（真实项目分组排版）
   ========================================================== */
.section-head .lead { font-size: 14.5px; color: var(--muted); max-width: 660px; margin-top: 14px; line-height: 1.9; }

.case-block { margin-bottom: 46px; }
.case-block:last-child { margin-bottom: 0; }
.case-block-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-bottom: 14px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.case-block-head h3 { font-size: 19px; color: var(--green-deep); letter-spacing: .5px; display: flex; align-items: center; gap: 10px; }
.case-block-head h3::before { content: ""; width: 5px; height: 18px; border-radius: 3px; background: var(--gold); }
.case-badge { font-size: 12px; color: var(--green); background: var(--green-soft); padding: 5px 13px; border-radius: 999px; white-space: nowrap; letter-spacing: .3px; }

.proj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.proj-item { position: relative; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.proj-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(15, 91, 78, .22); }
.proj-item .idx { font-size: 11.5px; letter-spacing: 2px; color: var(--gold); font-weight: 600; }
.proj-item h4 { font-size: 15.5px; line-height: 1.55; margin: 6px 0 12px; color: var(--ink); }
.proj-item .chips, .proj-wide .chips { display: flex; flex-wrap: wrap; gap: 6px; }

.chip { font-size: 11.5px; line-height: 1.7; padding: 2px 10px; border-radius: 999px; background: var(--green-soft); color: var(--green); letter-spacing: .3px; }
.chip.gold { background: rgba(184, 147, 90, .16); color: #8a6a34; }

.proj-wide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.proj-wide { background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: 12px; padding: 26px 28px; box-shadow: var(--shadow); }
.proj-wide .tag { font-size: 11.5px; letter-spacing: 2px; color: var(--gold); margin-bottom: 8px; }
.proj-wide h4 { font-size: 17px; color: var(--green-deep); line-height: 1.5; margin-bottom: 8px; }
.proj-wide h4 span { display: block; font-size: 12.5px; font-weight: 400; color: var(--muted); letter-spacing: 0; margin-top: 3px; }
.proj-wide p { font-size: 13.5px; color: var(--muted); line-height: 1.9; margin-bottom: 14px; }

@media (max-width: 900px) { .proj-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .proj-grid, .proj-wide-grid { grid-template-columns: 1fr; }
  .proj-wide { padding: 22px; }
  .case-block-head h3 { font-size: 17px; }
}

/* ==========================================================
   废水零排放与中水回用（专题区块）
   ========================================================== */
.zld-panel {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(118deg, #0b3f36 0%, #11604f 62%, #177a63 100%);
  border-radius: 22px; padding: 58px 56px; box-shadow: var(--shadow-lg);
  display: grid; grid-template-columns: 1.04fr .96fr; gap: 52px; align-items: center;
}
.zld-panel::after {
  content: ""; position: absolute; right: -130px; top: -150px; width: 440px; height: 440px;
  border-radius: 50%; background: radial-gradient(circle, rgba(184,147,90,.26), transparent 66%);
}
.zld-copy, .zld-flow { position: relative; z-index: 2; }
.zld-copy .kicker { color: rgba(255,255,255,.78); }
.zld-copy .kicker::before { background: var(--gold); }
.zld-copy h2 { font-size: clamp(24px, 2.7vw, 33px); letter-spacing: 3px; line-height: 1.4; margin-bottom: 18px; }
.zld-copy p { font-size: 14.5px; line-height: 1.95; color: rgba(255,255,255,.82); margin-bottom: 13px; text-align: justify; }
.zld-copy .chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 28px; }
.zld-copy .chip { background: rgba(255,255,255,.13); color: rgba(255,255,255,.92); border: 1px solid rgba(255,255,255,.16); }
.zld-copy .btn { background: #fff; color: var(--green-deep); }
.zld-copy .btn:hover { background: var(--green-soft); transform: translateY(-1px); }

.zld-flow { display: grid; gap: 11px; }
.zld-step {
  display: flex; gap: 15px; align-items: flex-start; padding: 17px 20px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.13); border-radius: 12px;
  transition: background .3s ease, transform .3s ease;
}
.zld-step:hover { background: rgba(255,255,255,.14); transform: translateX(3px); }
.zld-step .no { font-family: Georgia, serif; font-size: 13px; letter-spacing: 1px; color: var(--gold); flex: none; padding-top: 3px; }
.zld-step b { display: block; font-size: 15.5px; letter-spacing: .6px; margin-bottom: 3px; }
.zld-step span { font-size: 12.8px; color: rgba(255,255,255,.72); line-height: 1.8; }

/* 运维保障卡片 */
.ops-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ops-card {
  background: var(--paper); border: 1px solid var(--line); border-top: 3px solid var(--gold);
  border-radius: 14px; padding: 28px 26px; transition: transform .3s ease, box-shadow .3s ease;
}
.ops-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.ops-card .tag { font-size: 11.5px; letter-spacing: 2px; color: var(--gold); margin-bottom: 10px; }
.ops-card h3 { font-size: 16.5px; letter-spacing: .5px; color: var(--green-deep); margin-bottom: 10px; }
.ops-card p { font-size: 13.3px; color: var(--muted); line-height: 1.9; }
.zld-note { margin-top: 26px; font-size: 13px; color: var(--muted); line-height: 1.9; padding-left: 14px; border-left: 2px solid var(--line); }

/* 首页宣传条 */
.zld-strip {
  display: grid; grid-template-columns: 1.05fr 1.5fr auto; gap: 34px; align-items: center;
  background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--gold);
  border-radius: 16px; padding: 36px 40px; box-shadow: var(--shadow);
}
.zld-strip .kicker { margin-bottom: 6px; font-size: 12px; letter-spacing: 2.5px; }
.zld-strip h2 { font-size: 21px; letter-spacing: 1.5px; color: var(--green-deep); margin: 4px 0 10px; line-height: 1.5; }
.zld-strip .desc { font-size: 13.3px; color: var(--muted); line-height: 1.9; }
.zld-strip .pts { display: grid; gap: 13px; }
.zld-strip .pts > div { padding-left: 14px; border-left: 2px solid var(--green-soft); }
.zld-strip .pts b { display: block; font-size: 13.8px; color: var(--ink); letter-spacing: .4px; }
.zld-strip .pts span { font-size: 12.5px; color: var(--muted); line-height: 1.8; }

@media (max-width: 1024px) {
  .ops-grid { grid-template-columns: repeat(2, 1fr); }
  .zld-panel { gap: 36px; padding: 46px 40px; }
}
@media (max-width: 900px) {
  .zld-panel { grid-template-columns: 1fr; }
  .zld-strip { grid-template-columns: 1fr; gap: 24px; padding: 30px 26px; }
  .zld-strip .btn { width: 100%; }
}
@media (max-width: 640px) {
  .ops-grid { grid-template-columns: 1fr; }
  .zld-panel { padding: 34px 24px; border-radius: 16px; }
  .zld-copy h2 { letter-spacing: 1.5px; }
}

/* 在线监测运维 · 因子清单 */
.ops-factors { margin-top: 14px; display: grid; gap: 9px; }
.ops-factors > div { font-size: 12.4px; color: var(--muted); line-height: 1.85; }
.ops-factors .lb {
  display: inline-block; font-size: 11.5px; letter-spacing: .5px; color: var(--green);
  background: var(--green-soft); border-radius: 5px; padding: 1px 7px; margin-right: 6px;
  vertical-align: 1px;
}