/* ==========================================================================
   Feng Liu - Academic Site
   Theme: 天高云淡 · 草原长卷  (vast grassland under a high blue sky)
   - one panoramic grassland photo as fixed page backdrop (all pages)
   - frosted "glass" content panels floating over the meadow
   - palette: meadow green #1f9d55 / jade #0e9384 / ink #0e2a1d / sky #7ec8f2
   ========================================================================== */

:root {
  --bg: #f2f9f4;
  --bg-2: #e7f3ea;
  --surface: #ffffff;
  --ink: #0e2a1d;
  --ink-2: #2f4a3d;
  --muted: #5b7a6a;
  --faint: #8faa9b;
  --line: #dbebdf;
  --line-2: #ecf5ef;
  --accent: #1f9d55;
  --accent-dark: #14763f;
  --accent-soft: #e7f6ec;
  --tech: #0e9384;
  --tech-soft: #e5f6f4;
  --sky: #7ec8f2;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(20, 80, 50, .05);
  --shadow: 0 6px 20px rgba(20, 80, 50, .08);
  --shadow-lg: 0 18px 46px rgba(20, 80, 50, .13);
  --wrap: 1120px;
  /* frosted panel */
  --glass: linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(255, 255, 255, .84));
  --glass-top: rgba(255, 255, 255, .85);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* --------------------------------------------------------------------------
   1. THE BACKDROP  —  one fixed grassland panorama for every single page
   -------------------------------------------------------------------------- */
body {
  margin: 0;
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image: url("../img/bg-grassland.jpg");
  background-size: cover;
  background-position: center 22%;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

/* veil: sky stays visible up top, the meadow melts into a readable page below */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1000px 460px at 16% -8%, rgba(255, 255, 255, .40), transparent 64%),
    linear-gradient(180deg,
      rgba(255, 255, 255, .10) 0%,
      rgba(255, 255, 255, .40) 22%,
      rgba(246, 251, 247, .64) 44%,
      rgba(243, 250, 245, .84) 68%,
      rgba(241, 249, 243, .93) 100%);
}

/* ultra-fine paper grain so the large photo never looks flat */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

/* scrollbar — a small meadow detail */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #eaf4ed; }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #7cc394, #2fb15f); border-radius: 8px; border: 2px solid #eaf4ed; }
::-webkit-scrollbar-thumb:hover { background: #1f9d55; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 860px; }

/* --------------------------------------------------------------------------
   2. HEADER — frosted bar with a jade hairline
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: linear-gradient(180deg, rgba(255, 255, 255, .84), rgba(255, 255, 255, .70));
  backdrop-filter: saturate(170%) blur(16px);
  -webkit-backdrop-filter: saturate(170%) blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, .8);
  box-shadow: 0 1px 0 rgba(31, 157, 85, .10), 0 8px 24px rgba(20, 80, 50, .06);
}
.header-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  min-height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(140deg, #2fb15f, var(--tech));
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: .5px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(31, 157, 85, .30), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.brand-name { font-weight: 700; font-size: 17px; letter-spacing: -.01em; line-height: 1.2; color: var(--ink); }
.brand-sub { font-size: 12px; color: var(--muted); line-height: 1.3; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  position: relative;
  padding: 8px 13px; border-radius: 9px;
  color: var(--ink-2); font-size: 14.5px; font-weight: 500;
  white-space: nowrap; text-decoration: none; transition: color .18s, background .18s;
}
.site-nav a:hover { color: var(--accent); background: var(--accent-soft); text-decoration: none; }
.site-nav a.is-active { color: var(--accent); }
.site-nav a.is-active::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: -16px;
  height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--tech));
}
.nav-toggle {
  display: none; background: none; border: 1px solid rgba(255,255,255,.8);
  border-radius: 9px; padding: 7px 10px; cursor: pointer; color: var(--ink-2);
  box-shadow: 0 2px 8px rgba(20,80,50,.07);
}
.nav-toggle svg { display: block; }

/* --------------------------------------------------------------------------
   3. HERO — the full meadow panorama, text floating on it
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  border-bottom: 1px solid rgba(31, 157, 85, .12);
  box-shadow: 0 12px 34px rgba(20, 80, 50, .07);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg,
    rgba(255, 255, 255, .06) 0%,
    rgba(255, 255, 255, .30) 38%,
    rgba(246, 251, 248, .74) 64%,
    rgba(243, 250, 245, .97) 100%);
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1fr 258px; gap: 38px; align-items: center;
  padding: 64px 24px 62px; max-width: var(--wrap); margin: 0 auto;
}
.hero h1 {
  margin: 0 0 6px; font-size: 42px; line-height: 1.15; font-weight: 700; letter-spacing: -.02em;
  color: #0d2a1c;
  text-shadow: 0 1px 2px rgba(255, 255, 255, .55), 0 3px 18px rgba(255, 255, 255, .35);
}
.hero .role {
  font-size: 16px; color: #24503a; font-weight: 500; margin-bottom: 18px;
}
.hero .org { font-size: 14px; color: #3d6350; margin-bottom: 22px; }
.hero-quote {
  border-left: 3px solid var(--accent); padding-left: 18px;
  color: #1e4232; font-size: 16px; font-style: italic; margin: 0 0 10px;
  text-shadow: 0 1px 1px rgba(255, 255, 255, .5);
}
.hero-quote-src { font-size: 12.5px; color: #4d7263; font-style: normal; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 10px; font-size: 14.5px; font-weight: 600;
  border: 1px solid transparent; transition: transform .18s, box-shadow .18s, background .18s;
}
.btn-primary { background: linear-gradient(135deg, #2fb15f, var(--accent)); color: #fff; box-shadow: 0 6px 18px rgba(31,157,85,.28); }
.btn-primary:hover { background: var(--accent-dark); color: #fff; text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 26px rgba(31,157,85,.34); }
.btn-ghost { background: rgba(255,255,255,.72); color: #24503a; border-color: rgba(255,255,255,.9); box-shadow: 0 2px 10px rgba(20,80,50,.10); backdrop-filter: blur(6px); }
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.hero-photo {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 4px solid rgba(255, 255, 255, .92);
  box-shadow: 0 14px 38px rgba(20, 80, 50, .22);
}
.hero-photo img { width: 100%; height: 220px; object-fit: cover; }

/* hero portrait — a single photo, randomly drawn from the 4 portraits */
.hero-inner > div { min-width: 0; }
.hero-photo img {
  display: block; transition: opacity .35s ease;
  border-radius: 13px;
}
.hero-photo:hover img { transform: scale(1.015); }
.hero-photo img { transition: transform .45s ease, opacity .35s ease; }

/* --------------------------------------------------------------------------
   4. SECTIONS — soft separations, the meadow still shows through the gaps
   -------------------------------------------------------------------------- */
.section { padding: 68px 0; }
.section + .section {
  border-top: 1px solid rgba(255, 255, 255, .75);
  box-shadow: 0 -1px 0 rgba(31, 157, 85, .07);
}
.section-alt { background: rgba(255, 255, 255, .28); }

.sec-head { margin-bottom: 34px; max-width: 760px; }
.kicker {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 8px;
}
.kicker.tech { color: var(--tech); }
.sec-head h2 { margin: 0 0 8px; font-size: 27px; font-weight: 700; letter-spacing: -.015em; color: var(--ink); }
.sec-head p { margin: 0; color: var(--muted); font-size: 15px; }
.sec-head::after {
  content: ""; display: block; width: 46px; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--tech)); margin-top: 16px; opacity: .9;
}

/* --------------------------------------------------------------------------
   5. CARDS — frosted glass panels floating on the grassland
   -------------------------------------------------------------------------- */
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g2-wide { grid-template-columns: 1.35fr 1fr; }

.card {
  position: relative; overflow: hidden;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: var(--radius); padding: 24px;
  box-shadow: 0 8px 26px rgba(20, 80, 50, .08), inset 0 1px 0 rgba(255, 255, 255, .9);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card::before {           /* a thin sky-to-jade highlight along the top edge */
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--tech) 55%, var(--sky));
  opacity: .85;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(20, 80, 50, .15), inset 0 1px 0 rgba(255, 255, 255, .95);
  border-color: rgba(255, 255, 255, .95);
}
.card h3 { margin: 0 0 10px; font-size: 17px; font-weight: 650; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--ink-2); font-size: 14.5px; }
.card .card-ico {
  width: 44px; height: 44px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, #e8f6ed, #f4fbf6);
  border: 1px solid #d8ecdf; color: var(--accent); margin-bottom: 14px;
  box-shadow: 0 3px 10px rgba(31, 157, 85, .10);
}
.card .card-ico svg { width: 22px; height: 22px; }
.card-tech .card-ico { color: var(--tech); border-color: #d3ece9; background: linear-gradient(140deg, var(--tech-soft), #f2fbfa); }
.tag {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .04em;
  padding: 3px 9px; border-radius: 999px; background: var(--accent-soft);
  color: var(--accent); margin-bottom: 10px;
}
.tag-tech { background: var(--tech-soft); color: var(--tech); }

/* Collaboration & Admissions — icon-only cards (no photo) */
.card-center { text-align: center; }
.card-center .card-ico { margin-left: auto; margin-right: auto; }
.card-center p { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   6. STATS
   -------------------------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.stat {
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: var(--radius);
  padding: 22px 18px; text-align: center;
  box-shadow: 0 8px 24px rgba(20, 80, 50, .08), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.stat .num { font-size: 32px; font-weight: 700; letter-spacing: -.03em; color: var(--accent); line-height: 1.1; }
.stat .lbl { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* --------------------------------------------------------------------------
   7. NEWS
   -------------------------------------------------------------------------- */
.news-list { display: grid; gap: 12px; }
.news-item {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 18px 20px;
  box-shadow: 0 6px 20px rgba(20, 80, 50, .07), inset 0 1px 0 rgba(255, 255, 255, .9);
  transition: box-shadow .2s, transform .2s;
}
.news-item:hover { box-shadow: var(--shadow-lg); transform: translateX(2px); }
.news-item .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  margin-top: 9px; flex: none;
}
.news-item p { margin: 0; font-size: 15px; color: var(--ink-2); }

/* --------------------------------------------------------------------------
   8. PUBLICATION LIST
   -------------------------------------------------------------------------- */
.pubs { display: grid; gap: 2px; }
.pub {
  display: grid; grid-template-columns: 34px 1fr; gap: 14px;
  padding: 13px 12px; border-radius: 10px; align-items: start;
  transition: background .18s;
}
.pub:hover { background: var(--accent-soft); }
.pub .n {
  font-variant-numeric: tabular-nums; font-size: 12.5px; font-weight: 700;
  color: var(--faint); text-align: center; line-height: 1.9;
  min-width: 30px;
}
.pub:hover .n { color: var(--accent); }
.pub .tx { font-size: 14.5px; color: var(--ink-2); line-height: 1.7; }
.pub .venue {
  display: inline-block; font-size: 11.5px; font-weight: 600; letter-spacing: .02em;
  color: var(--tech); background: var(--tech-soft); border-radius: 6px; padding: 1px 7px; margin-left: 6px;
}
.pub .yr { color: var(--faint); font-size: 13px; }
.ccf {
  display: inline-block; font-size: 11px; font-weight: 700; padding: 1px 7px;
  border-radius: 6px; margin-left: 6px; vertical-align: 1px;
}
.ccf-a { background: #fdecea; color: #b3261e; }
.ccf-b { background: #ffeee1; color: #b3530a; }
.ccf-c { background: #e3f7e9; color: #14804a; }
/* publisher link of a publication entry (kept before the CCF badges) */
.pub .doi, .doi {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .02em;
  padding: 1px 7px; border-radius: 6px; margin-left: 6px;
  color: var(--tech); background: #fff; border: 1px solid rgba(14, 147, 132, .32);
  text-decoration: none; transition: background .16s, color .16s, border-color .16s;
}
.pub .doi:hover, .doi:hover { background: var(--tech); border-color: var(--tech); color: #fff; }

/* --------------------------------------------------------------------------
   9. TIMELINE
   -------------------------------------------------------------------------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--tech), var(--line));
  border-radius: 2px;
}
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -25px; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fff; border: 2.5px solid var(--accent);
}
.tl-item::after {
  content: ""; position: absolute; left: -21px; top: 11px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--tech);
}
.tl-when { font-size: 13px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.tl-what { font-size: 16px; font-weight: 650; margin: 2px 0 3px; }
.tl-desc { font-size: 14.5px; color: var(--ink-2); }

/* --------------------------------------------------------------------------
   10. SIMPLE LISTS
   -------------------------------------------------------------------------- */
.num-list { display: grid; gap: 10px; counter-reset: nl; }
.num-list li {
  list-style: none; counter-increment: nl; position: relative;
  padding-left: 34px; font-size: 14.5px; color: var(--ink-2); line-height: 1.7;
}
.num-list li::before {
  content: counter(nl, decimal-leading-zero);
  position: absolute; left: 0; top: 3px;
  font-size: 11.5px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); border-radius: 6px; padding: 1px 6px;
}
.simple-list { display: grid; gap: 9px; }
.simple-list li { font-size: 14.5px; color: var(--ink-2); line-height: 1.7; padding-left: 2px; }

/* --------------------------------------------------------------------------
   11. PORTFOLIO
   -------------------------------------------------------------------------- */
.pf-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.pf {
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: var(--radius-lg);
  overflow: hidden; transition: transform .2s, box-shadow .2s;
  box-shadow: 0 10px 28px rgba(20, 80, 50, .09), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.pf:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.pf .pf-img { height: 190px; background: rgba(232, 244, 236, .85); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.pf .pf-img img { width: 100%; height: 100%; object-fit: contain; padding: 12px; }
.pf .pf-body { padding: 20px 22px 24px; }
.pf h3 { margin: 0 0 8px; font-size: 16.5px; font-weight: 650; line-height: 1.45; }
.pf p { margin: 0; font-size: 14px; color: var(--ink-2); }
/* paper title + published badge */
.pf-title { color: var(--ink); text-decoration: none; border-bottom: 1.5px solid rgba(31, 157, 85, .32); }
.pf-title:hover { color: var(--accent); border-bottom-color: var(--accent); }
.pf-link {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 14px;
  padding: 6px 12px; border-radius: 999px; text-decoration: none;
  color: var(--tech); background: rgba(255, 255, 255, .8);
  border: 1px solid rgba(14, 147, 132, .28); transition: background .16s, color .16s, border-color .16s;
}
.pf-link svg { width: 15px; height: 15px; flex: none; }
.pf-link-txt { font-size: 12.5px; font-weight: 650; letter-spacing: .02em; }
.pf-link-doi {
  font-size: 11.5px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--muted);
}
.pf-link:hover { background: var(--tech); border-color: var(--tech); color: #fff; }
.pf-link:hover .pf-link-doi { color: rgba(255, 255, 255, .88); }

/* --------------------------------------------------------------------------
   12. SERVICES / JOURNAL CARDS
   -------------------------------------------------------------------------- */
.svc { display: grid; grid-template-columns: 260px 1fr; gap: 26px; align-items: start; }
.svc-cover {
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: var(--radius);
  padding: 16px; box-shadow: 0 8px 24px rgba(20, 80, 50, .08), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.svc-cover img { width: 100%; border-radius: 10px; }
/* external link inside a section heading */
.ext-link {
  color: var(--accent); text-decoration: none;
  border-bottom: 1.5px solid rgba(31, 157, 85, .35);
  transition: color .16s, border-color .16s;
}
.ext-link:hover { color: var(--tech); border-bottom-color: var(--tech); }
/* conference key dates */
.svc-dates {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 18px;
  margin-top: 20px; padding: 16px 18px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .72); border: 1px solid rgba(255, 255, 255, .8);
}
.svc-date { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.svc-date-k { font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.svc-date-v {
  font-size: 14px; font-weight: 650; color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   13. LINKS
   -------------------------------------------------------------------------- */
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.link-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(155%);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: 12px;
  padding: 14px 16px; font-size: 14.5px; font-weight: 550; color: var(--ink-2);
  box-shadow: 0 6px 18px rgba(20, 80, 50, .07);
  transition: transform .18s, border-color .18s, box-shadow .18s;
}
.link-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow); text-decoration: none; color: var(--accent); }
.link-card svg { width: 18px; height: 18px; color: var(--accent); flex: none; }
/* title + subtitle inside a link card */
.link-card .lc-txt { display: grid; gap: 3px; line-height: 1.35; }
.link-card .lc-sub {
  display: block; font-size: 12.2px; font-weight: 500;
  color: var(--muted); letter-spacing: .2px;
}
.link-card:hover .lc-sub { color: var(--accent); }
/* merged "推荐期刊目录" entry: picture-in-title with a small subtitle */
.link-card-merge { flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   14. SUB PAGE HEADER / FOOTER
   -------------------------------------------------------------------------- */
.tool-hero {
  background: linear-gradient(180deg, rgba(255, 255, 255, .18) 0%, rgba(246, 251, 248, .70) 62%, rgba(243, 250, 245, .95) 100%);
  border-bottom: 1px solid rgba(31, 157, 85, .12);
  box-shadow: 0 12px 34px rgba(20, 80, 50, .07);
}
.tool-hero .wrap { padding: 52px 24px; }
.back-link { font-size: 13.5px; color: #3d6350; }
.back-link a { color: var(--accent); }

.site-footer {
  background: linear-gradient(180deg, rgba(255, 255, 255, .80), rgba(232, 244, 236, .72));
  border-top: 1px solid rgba(31, 157, 85, .14);
  margin-top: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .8);
}
.footer-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 40px 24px;
  display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: center;
}
.footer-inner .f-nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; }
.footer-inner .f-nav a { color: var(--ink-2); }
.footer-inner .f-nav a:hover { color: var(--accent); }
.footer-copy { font-size: 13px; color: var(--faint); }

/* --------------------------------------------------------------------------
   15. RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1000px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .svc { grid-template-columns: 1fr; }
  .svc-cover { max-width: 240px; }
  .link-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  /* fixed backdrop is jittery on iOS — fall back to a centred scroll backdrop */
  body { background-attachment: scroll; background-position: center 12%; }
  body::before { background-attachment: scroll; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--line);
    padding: 10px 16px 14px; box-shadow: var(--shadow);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; }
  .site-nav a.is-active::after { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding: 44px 24px 40px; gap: 26px; }
  .hero-inner > div:last-child { display: flex; flex-direction: column; align-items: center; }
  .hero-photo { max-width: 200px; }
  .hero h1 { font-size: 32px; }
  .g2, .g3, .g4, .g2-wide, .pf-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .sec-head h2 { font-size: 23px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .link-grid { grid-template-columns: 1fr; }
  .svc { grid-template-columns: 1fr; }
  .svc-dates { grid-template-columns: 1fr; }
  .svc-cover { max-width: 260px; }
}

@media (max-width: 520px) {
  body { font-size: 15px; }
  .wrap, .header-inner { padding: 0 16px; }
  .pub { grid-template-columns: 26px 1fr; gap: 10px; padding: 12px 8px; }
  .pub .tx { font-size: 14px; }
  .btn { width: 100%; justify-content: center; }
  .hero-actions { width: 100%; flex-direction: column; }
}