/* =============================================================
   Thin-Wall Injection Molding — Engineering Guide
   Scope: .gc-twim  — 100% isolated, no global leakage
   Palette: navy #0f2747 | blue #0052cc | cyan #0e7490 | amber #b45309
   Image spec: --hero 3:2 | --43 4:3 | --169 16:9 | --wide 21:9 | --11 1:1
   ============================================================= */
.gc-twim{--navy:#0f2747;--blue:#0052cc;--blue-d:#003d99;--cyan:#0e7490;--cyan-l:#e4f1f5;
  --amber:#b45309;--amber-l:#fdf4e7;--ink:#12233a;--ink-2:#42546b;--line:#e2e8f0;
  --bg:#ffffff;--bg-2:#f6f8fb;--bg-3:#eef2f8;--r:12px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);line-height:1.72;font-size:16px;background:var(--bg);
  -webkit-font-smoothing:antialiased;}
.gc-twim *{box-sizing:border-box;}
.gc-twim img{display:block;max-width:100%;height:auto;}
.gc-twim a{color:var(--blue);text-decoration:none;}
.gc-twim a:hover{text-decoration:underline;}
.gc-twim p{margin:0 0 16px;}
.gc-twim .gc-flush{margin-bottom:0;}

/* ---------- layout ---------- */
.gc-twim .gc-wrap{max-width:1120px;margin:0 auto;padding:0 24px;}
.gc-twim .gc-sec{padding:72px 0;border-top:1px solid var(--line);}
.gc-twim .gc-sec--alt{background:var(--bg-2);}
.gc-twim .gc-sec--first{border-top:0;}
.gc-twim .gc-sec--tight{padding:48px 0;border-top:0;}

/* ---------- headings ---------- */
.gc-twim .gc-h2{font-size:31px;line-height:1.28;font-weight:700;color:var(--navy);
  margin:0 0 10px;letter-spacing:-.3px;position:relative;padding-left:20px;}
.gc-twim .gc-h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:6px;
  border-radius:3px;background:linear-gradient(180deg,var(--blue),var(--cyan));}
.gc-twim .gc-h2sub{margin:0 0 28px;padding-left:20px;color:var(--ink-2);font-size:16.5px;}
.gc-twim .gc-h3{font-size:20px;line-height:1.35;font-weight:700;color:var(--navy);margin:36px 0 10px;}
.gc-twim .gc-h3:first-of-type{margin-top:22px;}
.gc-twim .gc-h4{font-size:16.5px;font-weight:700;color:var(--navy);margin:0 0 6px;}
.gc-twim .gc-lead{font-size:17.5px;color:var(--ink-2);margin:0 0 22px;}
.gc-twim .gc-eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:1.4px;
  text-transform:uppercase;color:var(--cyan);margin:0 0 12px;}
.gc-twim .gc-eyebrow--light{color:#5fd3e8;}
.gc-twim .gc-meta{font-size:13.4px;color:var(--ink-2);margin:0 0 22px;}
.gc-twim .gc-meta b{color:var(--navy);}
.gc-twim .gc-meta--up{margin-top:26px;}

/* =============================================================
   IMAGE SPEC SYSTEM
   ============================================================= */
.gc-twim .gc-fig,
.gc-twim .gc-imgs > figure{margin:0;overflow:hidden;background:#fff;
  border:1px solid var(--line);border-radius:var(--r);
  box-shadow:0 4px 14px rgba(15,39,71,.06);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;}
.gc-twim .gc-fig:hover,
.gc-twim .gc-imgs > figure:hover{transform:translateY(-4px);
  box-shadow:0 18px 38px rgba(15,39,71,.15);border-color:#c7dcf2;}
.gc-twim .gc-fig img,
.gc-twim .gc-imgs > figure img{display:block;width:100%;height:auto;object-fit:cover;
  background:var(--bg-3);transition:transform .6s cubic-bezier(.2,.7,.3,1);}
.gc-twim .gc-fig:hover img,
.gc-twim .gc-imgs > figure:hover img{transform:scale(1.055);}
.gc-twim .gc-fig--hero img{aspect-ratio:3/2;}
.gc-twim .gc-fig--43 img{aspect-ratio:4/3;}
.gc-twim .gc-fig--169 img{aspect-ratio:16/9;}
.gc-twim .gc-fig--11 img{aspect-ratio:1/1;}
.gc-twim .gc-fig--wide img{aspect-ratio:21/9;}
.gc-twim .gc-imgs > figure img{aspect-ratio:4/3;}
.gc-twim .gc-imgs--2 > figure img{aspect-ratio:16/9;}
.gc-twim .gc-fig figcaption,
.gc-twim .gc-imgs > figure figcaption{padding:12px 17px 14px;font-size:13.2px;line-height:1.6;
  color:var(--ink-2);border-top:1px solid var(--line);background:#fbfcfe;}
.gc-twim .gc-fig--hero{border:0;border-radius:14px;box-shadow:0 22px 52px rgba(0,0,0,.36);}
.gc-twim .gc-fig--hero:hover{transform:none;border-color:transparent;box-shadow:0 26px 60px rgba(0,0,0,.42);}
.gc-twim .gc-fig--wide{max-width:900px;margin:0 auto;}
/* 示意图：白底留白更多，不裁切 */
.gc-twim .gc-fig--diag img{object-fit:contain;background:#fff;padding:10px;}

/* ---------- hero ---------- */
.gc-twim .gc-hero{background:linear-gradient(135deg,#0f2747 0%,#123a63 55%,#0b5f79 100%);
  color:#fff;padding:66px 0 0;}
.gc-twim .gc-hero__grid{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:start;}
.gc-twim .gc-hero__title{font-size:40px;line-height:1.18;font-weight:800;letter-spacing:-.9px;
  margin:0 0 16px;color:#fff;}
.gc-twim .gc-hero__sub{font-size:17px;line-height:1.66;color:#c9dcee;margin:0 0 24px;max-width:640px;}
.gc-twim .gc-hero__chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px;padding:0;list-style:none;}
.gc-twim .gc-chip{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.11);
  border:1px solid rgba(255,255,255,.24);color:#eaf2fb;font-size:12.6px;font-weight:600;
  padding:6px 12px;border-radius:999px;line-height:1.5;}
.gc-twim .gc-chip::before{content:"";width:6px;height:6px;border-radius:50%;background:#5fd3e8;flex:0 0 auto;}
.gc-twim .gc-hero__btns{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:8px;}

/* ---------- buttons ---------- */
.gc-twim .gc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--blue);color:#fff;font-size:15px;font-weight:700;padding:13px 24px;
  border:0;border-radius:8px;cursor:pointer;font-family:inherit;line-height:1.3;
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;}
.gc-twim .gc-btn:hover{background:var(--blue-d);transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(0,82,204,.28);text-decoration:none;}
.gc-twim .gc-btn--ghost{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff;}
.gc-twim .gc-btn--ghost:hover{background:rgba(255,255,255,.12);box-shadow:none;}
.gc-twim .gc-btn--sm{font-size:14px;padding:10px 18px;}

/* ---------- answer box ---------- */
.gc-twim .gc-answer{background:var(--cyan-l);border:1px solid #c3e0e9;border-left:4px solid var(--cyan);
  border-radius:10px;padding:22px 24px;margin:0 0 30px;}
.gc-twim .gc-answer p:last-child{margin-bottom:0;}
.gc-twim .gc-answer strong{color:var(--navy);}

/* ---------- callouts ---------- */
.gc-twim .gc-note{background:var(--bg-2);border:1px solid var(--line);border-left:4px solid var(--blue);
  border-radius:8px;padding:18px 20px;margin:22px 0;font-size:15.2px;color:var(--ink-2);}
.gc-twim .gc-note p:last-child{margin-bottom:0;}
.gc-twim .gc-note--warn{background:var(--amber-l);border-color:#f0dcc0;border-left-color:var(--amber);}
.gc-twim .gc-note--ok{background:var(--cyan-l);border-color:#c3e0e9;border-left-color:var(--cyan);}
.gc-twim .gc-note--flush{margin-top:0;}
.gc-twim .gc-note__t{font-weight:800;color:var(--navy);display:block;margin-bottom:6px;font-size:15px;}

/* ---------- tables ---------- */
.gc-twim .gc-tw{overflow-x:auto;margin:22px 0 8px;border:1px solid var(--line);border-radius:10px;background:#fff;}
.gc-twim .gc-tw table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px;}
.gc-twim .gc-tw thead th{background:linear-gradient(180deg,#122f55,var(--navy));color:#fff;text-align:left;
  font-weight:700;font-size:13.4px;letter-spacing:.3px;padding:14px 16px;white-space:nowrap;}
.gc-twim .gc-tw th[scope="row"]{background:var(--bg-3);color:var(--navy);font-weight:700;
  width:190px;vertical-align:top;white-space:normal;}
.gc-twim .gc-tw td,.gc-twim .gc-tw tbody th{border-top:1px solid var(--line);padding:13px 16px;
  vertical-align:top;color:var(--ink-2);}
.gc-twim .gc-tw tbody tr:nth-child(even) td{background:#fafcfe;}
.gc-twim .gc-tw tbody tr:hover td,.gc-twim .gc-tw tbody tr:hover th[scope="row"]{background:var(--cyan-l);}
.gc-twim .gc-tw td strong,.gc-twim .gc-tw td b{color:var(--navy);}

/* ---------- cards ---------- */
.gc-twim .gc-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:26px 0 8px;}
.gc-twim .gc-cards--2{grid-template-columns:repeat(2,1fr);}
.gc-twim .gc-cards--4{grid-template-columns:repeat(4,1fr);}
.gc-twim .gc-cards--tight{margin-top:16px;}
.gc-twim .gc-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px 20px 18px;
  position:relative;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.gc-twim .gc-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--blue),var(--cyan));}
.gc-twim .gc-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,39,71,.12);
  border-color:#cddbee;}
.gc-twim .gc-card .gc-h3{margin:0 0 8px;font-size:17.5px;}
.gc-twim .gc-card p{font-size:14.8px;color:var(--ink-2);margin:0 0 10px;}
.gc-twim .gc-card p:last-child{margin-bottom:0;}
.gc-twim .gc-card ul{margin:0;padding-left:18px;font-size:14.6px;color:var(--ink-2);}
.gc-twim .gc-card li{margin-bottom:5px;}
.gc-twim .gc-card__tag{display:inline-block;font-size:11.6px;font-weight:800;letter-spacing:.6px;
  text-transform:uppercase;color:var(--cyan);background:var(--cyan-l);border-radius:4px;
  padding:3px 8px;margin-bottom:9px;}
.gc-twim .gc-card__tag--a{color:var(--amber);background:var(--amber-l);}

/* ---------- split ---------- */
.gc-twim .gc-split{display:grid;grid-template-columns:1.02fr .98fr;gap:38px;align-items:start;margin:34px 0;}
.gc-twim .gc-split--rev > .gc-fig{order:-1;}
.gc-twim .gc-split > .gc-fig{position:sticky;top:24px;}

/* ---------- image grid ---------- */
.gc-twim .gc-imgs{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:30px 0 10px;}
.gc-twim .gc-imgs--2{grid-template-columns:repeat(2,1fr);}

/* ---------- causal chain ---------- */
.gc-twim .gc-chain{display:flex;flex-wrap:wrap;align-items:stretch;gap:10px;margin:26px 0 8px;}
.gc-twim .gc-chain__i{flex:1 1 150px;background:#fff;border:1px solid var(--line);border-top:3px solid var(--cyan);
  border-radius:8px;padding:13px 14px;min-width:140px;transition:transform .2s ease,box-shadow .2s ease;}
.gc-twim .gc-chain__i:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(15,39,71,.09);}
.gc-twim .gc-chain__i:nth-child(2n){border-top-color:var(--blue);}
.gc-twim .gc-chain__i:nth-child(3n){border-top-color:var(--amber);}
.gc-twim .gc-chain__t{font-weight:700;color:var(--navy);font-size:14.6px;display:block;margin-bottom:3px;}
.gc-twim .gc-chain__d{font-size:13.4px;color:var(--ink-2);line-height:1.5;}

/* ---------- failure chain (vertical) ---------- */
.gc-twim .gc-fail{margin:26px 0 10px;border-left:3px solid var(--amber);padding-left:24px;}
.gc-twim .gc-fail__step{position:relative;padding:0 0 18px 0;}
.gc-twim .gc-fail__step::before{content:"";position:absolute;left:-31px;top:9px;width:11px;height:11px;
  border-radius:50%;background:#fff;border:3px solid var(--amber);}
.gc-twim .gc-fail__step:last-child::before{background:var(--amber);}
.gc-twim .gc-fail__t{font-weight:800;color:var(--navy);font-size:16px;display:block;margin-bottom:3px;}
.gc-twim .gc-fail__d{font-size:14.8px;color:var(--ink-2);margin:0;}
.gc-twim .gc-fail--tight{margin:12px 0 0;}

/* ---------- design rules ---------- */
.gc-twim .gc-rule{display:grid;grid-template-columns:56px 1fr;gap:18px;background:#fff;
  border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin:0 0 14px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;}
.gc-twim .gc-rule:hover{border-color:#cddbee;box-shadow:0 10px 24px rgba(15,39,71,.09);transform:translateY(-2px);}
.gc-twim .gc-rule__no{width:56px;height:56px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--navy),#17406e);color:#fff;font-weight:800;font-size:19px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 14px rgba(15,39,71,.18);}
.gc-twim .gc-rule__t{font-size:18px;font-weight:700;color:var(--navy);margin:0 0 6px;}
.gc-twim .gc-rule p{font-size:15px;color:var(--ink-2);margin:0 0 8px;}
.gc-twim .gc-rule p:last-child{margin-bottom:0;}
.gc-twim .gc-rule__why{font-size:14.4px;color:var(--ink-2);background:var(--bg-2);
  border-left:3px solid var(--cyan);border-radius:0 6px 6px 0;padding:9px 13px;margin-top:8px;}
.gc-twim .gc-rule__why b{color:var(--navy);}

/* ---------- process parameter (goal / risk pairs) ---------- */
.gc-twim .gc-pp{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);
  border-radius:10px;overflow:hidden;margin:14px 0 18px;background:#fff;}
.gc-twim .gc-pp__c{padding:16px 18px;}
.gc-twim .gc-pp__c:first-child{border-right:1px solid var(--line);background:#f4fbfd;}
.gc-twim .gc-pp__c:last-child{background:#fdf8f1;}
.gc-twim .gc-pp__h{font-size:12.4px;font-weight:800;letter-spacing:1px;text-transform:uppercase;
  display:block;margin-bottom:7px;}
.gc-twim .gc-pp__c:first-child .gc-pp__h{color:var(--cyan);}
.gc-twim .gc-pp__c:last-child .gc-pp__h{color:var(--amber);}
.gc-twim .gc-pp__c p{font-size:14.8px;color:var(--ink-2);margin:0;}
.gc-twim .gc-pp__c p + p{margin-top:8px;}

/* ---------- compare columns ---------- */
.gc-twim .gc-cmp{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0;}
.gc-twim .gc-cmp__col{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;}
.gc-twim .gc-cmp__hd{padding:12px 18px;font-weight:800;font-size:15.4px;color:#fff;}
.gc-twim .gc-cmp__col:first-child .gc-cmp__hd{background:linear-gradient(90deg,#1c4675,#1c4675);}
.gc-twim .gc-cmp__col:last-child .gc-cmp__hd{background:linear-gradient(90deg,var(--cyan),#0b5f79);}
.gc-twim .gc-cmp__bd{padding:16px 18px;}
.gc-twim .gc-cmp__bd ul{margin:0;padding-left:18px;font-size:14.8px;color:var(--ink-2);}
.gc-twim .gc-cmp__bd li{margin-bottom:7px;}

/* ---------- checklist ---------- */
.gc-twim .gc-check{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0 8px;}
.gc-twim .gc-check__g{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px;}
.gc-twim .gc-check__g h4{font-size:15.4px;font-weight:800;color:var(--navy);margin:0 0 12px;
  text-transform:uppercase;letter-spacing:.8px;}
.gc-twim .gc-check__l{list-style:none;margin:0;padding:0;}
.gc-twim .gc-check__l li{position:relative;padding-left:30px;margin-bottom:9px;font-size:14.8px;color:var(--ink-2);}
.gc-twim .gc-check__l li::before{content:"";position:absolute;left:0;top:2px;width:17px;height:17px;
  border:2px solid var(--cyan);border-radius:4px;background:#fff;}
.gc-twim .gc-check__l li::after{content:"";position:absolute;left:5px;top:6px;width:6px;height:3px;
  border-left:2px solid var(--cyan);border-bottom:2px solid var(--cyan);transform:rotate(-45deg);}

/* ---------- feasibility flow ---------- */
.gc-twim .gc-feas{margin:24px 0 8px;background:var(--navy);border-radius:12px;padding:26px 26px 22px;}
.gc-twim .gc-feas__g{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.gc-twim .gc-feas__i{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:8px;padding:13px 14px;transition:background .2s ease,transform .2s ease;}
.gc-twim .gc-feas__i:hover{background:rgba(255,255,255,.14);transform:translateY(-2px);}
.gc-twim .gc-feas__q{font-weight:700;color:#fff;font-size:14.8px;display:block;margin-bottom:3px;}
.gc-twim .gc-feas__d{font-size:13.2px;color:#a9c4de;line-height:1.5;}
.gc-twim .gc-feas__out{margin:18px 0 0;padding:14px 18px;border-radius:8px;background:rgba(95,211,232,.14);
  border:1px solid rgba(95,211,232,.35);color:#dff3fa;font-size:15px;}
.gc-twim .gc-feas__out b{color:#8ee6f7;}

/* ---------- lists ---------- */
.gc-twim .gc-ul{margin:14px 0 18px;padding-left:20px;}
.gc-twim .gc-ul li{margin-bottom:8px;color:var(--ink-2);}
.gc-twim .gc-ul li strong{color:var(--navy);}
.gc-twim .gc-ul--flush{margin-bottom:0;}
.gc-twim .gc-tick{list-style:none;padding-left:0;}
.gc-twim .gc-tick li{position:relative;padding-left:28px;margin-bottom:10px;color:var(--ink-2);}
.gc-twim .gc-tick li::before{content:"";position:absolute;left:0;top:8px;width:16px;height:16px;
  border-radius:50%;background:var(--cyan-l);border:2px solid var(--cyan);}
.gc-twim .gc-tick li::after{content:"";position:absolute;left:5px;top:12px;width:6px;height:3px;
  border-left:2px solid var(--cyan);border-bottom:2px solid var(--cyan);transform:rotate(-45deg);}

/* ---------- case study ---------- */
.gc-twim .gc-case{background:#fff;border:1px solid var(--line);border-radius:11px;padding:0;
  margin:26px 0;overflow:hidden;transition:box-shadow .25s ease,border-color .25s ease;}
.gc-twim .gc-case:hover{box-shadow:0 16px 34px rgba(15,39,71,.11);border-color:#cddbee;}
.gc-twim .gc-case__hd{background:linear-gradient(90deg,var(--navy),#16406e);color:#fff;padding:15px 22px;}
.gc-twim .gc-case__hd .gc-h4{color:#fff;font-size:17px;margin:0;}
.gc-twim .gc-case__hd span{font-size:12.6px;color:#b8cfe8;letter-spacing:.4px;text-transform:uppercase;font-weight:700;}
.gc-twim .gc-case__bd{padding:20px 22px 8px;}
.gc-twim .gc-case__bd dl{margin:0;display:grid;grid-template-columns:170px 1fr;gap:0;}
.gc-twim .gc-case__bd dt{font-weight:800;color:var(--navy);font-size:14.4px;padding:9px 0;border-top:1px solid var(--line);}
.gc-twim .gc-case__bd dd{margin:0;padding:9px 0;border-top:1px solid var(--line);font-size:14.8px;color:var(--ink-2);}
.gc-twim .gc-case__bd dl > dt:first-of-type,.gc-twim .gc-case__bd dl > dd:first-of-type{border-top:0;}

/* ---------- faq ---------- */
.gc-twim .gc-faq{margin:26px 0 8px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;}
.gc-twim .gc-faq__item{border-bottom:1px solid var(--line);}
.gc-twim .gc-faq__item:last-child{border-bottom:0;}
.gc-twim .gc-faq__q{width:100%;text-align:left;background:#fff;border:0;cursor:pointer;
  font-family:inherit;font-size:16px;font-weight:700;color:var(--navy);padding:17px 52px 17px 20px;
  position:relative;line-height:1.5;transition:background .15s ease,color .15s ease;}
.gc-twim .gc-faq__q:hover{background:var(--bg-2);}
.gc-twim .gc-faq__q::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--blue);line-height:1;}
.gc-twim .gc-faq__item.is-open .gc-faq__q{background:var(--bg-2);color:var(--blue);}
.gc-twim .gc-faq__item.is-open .gc-faq__q::after{content:"\2212";}
.gc-twim .gc-faq__a{display:none;padding:0 20px 18px;font-size:15.2px;color:var(--ink-2);}
.gc-twim .gc-faq__item.is-open .gc-faq__a{display:block;}
.gc-twim .gc-faq__a p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.gc-twim .gc-cta{background:linear-gradient(120deg,#0f2747 0%,#1b3f6d 50%,#0b5f79 100%);color:#fff;
  padding:56px 0;text-align:center;}
.gc-twim .gc-cta__h{color:#fff;padding-left:0;font-size:29px;letter-spacing:-.4px;}
.gc-twim .gc-cta__h::before{display:none;}
.gc-twim .gc-cta__lead{color:#c9dcee;max-width:800px;margin:0 auto 16px;}
.gc-twim .gc-cta__list{list-style:none;padding:0;margin:0 auto 28px;display:flex;flex-wrap:wrap;
  justify-content:center;gap:10px 22px;max-width:840px;}
.gc-twim .gc-cta__list li{font-size:14.4px;color:#c8dcf2;position:relative;padding-left:20px;}
.gc-twim .gc-cta__list li::before{content:"\2713";position:absolute;left:0;color:#5fd3e8;font-weight:700;}
.gc-twim .gc-cta__btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}

/* ---------- related ---------- */
.gc-twim .gc-rel{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0 0;}
.gc-twim .gc-rel a{display:block;background:#fff;border:1px solid var(--line);border-radius:9px;
  padding:16px 18px;font-size:15px;font-weight:600;color:var(--navy);transition:all .18s ease;}
.gc-twim .gc-rel a:hover{border-color:var(--blue);background:var(--bg-2);text-decoration:none;
  transform:translateY(-2px);box-shadow:0 8px 18px rgba(15,39,71,.08);}
.gc-twim .gc-rel a small{display:block;font-weight:400;font-size:13.2px;color:var(--ink-2);margin-top:4px;}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .gc-twim .gc-hero__grid{grid-template-columns:1fr;gap:30px;}
  .gc-twim .gc-hero__title{font-size:32px;}
  .gc-twim .gc-cards,.gc-twim .gc-cards--4,.gc-twim .gc-imgs{grid-template-columns:repeat(2,1fr);}
  .gc-twim .gc-split{grid-template-columns:1fr;gap:24px;}
  .gc-twim .gc-split--rev > .gc-fig{order:0;}
  .gc-twim .gc-split > .gc-fig{position:static;max-width:560px;}
  .gc-twim .gc-check{grid-template-columns:1fr;}
  .gc-twim .gc-feas__g{grid-template-columns:repeat(2,1fr);}
  .gc-twim .gc-rel{grid-template-columns:1fr;}
  .gc-twim .gc-fig--hero{max-width:640px;}
}
@media (max-width:640px){
  .gc-twim{font-size:15.4px;}
  .gc-twim .gc-wrap{padding:0 16px;}
  .gc-twim .gc-sec{padding:46px 0;}
  .gc-twim .gc-h2{font-size:25px;}
  .gc-twim .gc-hero__title{font-size:26px;}
  .gc-twim .gc-cards,.gc-twim .gc-cards--2,.gc-twim .gc-cards--4,
  .gc-twim .gc-imgs,.gc-twim .gc-imgs--2{grid-template-columns:1fr;}
  .gc-twim .gc-pp{grid-template-columns:1fr;}
  .gc-twim .gc-pp__c:first-child{border-right:0;border-bottom:1px solid var(--line);}
  .gc-twim .gc-cmp{grid-template-columns:1fr;}
  .gc-twim .gc-rule{grid-template-columns:1fr;gap:12px;}
  .gc-twim .gc-case__bd dl{grid-template-columns:1fr;}
  .gc-twim .gc-case__bd dd{border-top:0;padding-top:0;margin-bottom:8px;}
  .gc-twim .gc-case__bd dt{padding-bottom:2px;}
  .gc-twim .gc-cta__h{font-size:23px;}
  .gc-twim .gc-feas__g{grid-template-columns:1fr;}
  .gc-twim .gc-fig--wide img{aspect-ratio:16/9;}
}