/*
Theme Name: Sina Clinic Signature V20 — Knowledge Reference
Theme URI: https://www.ssamak.ir/
Author: Sina Clinic
Version: 20.0
Description: Knowledge-first RTL audiology and hearing-aid clinic theme for Sina Clinic, Babol. Adds a mobile-friendly knowledge architecture, encyclopedia styling, structured metadata, breadcrumbs, FAQs and expert content while preserving existing URLs and content architecture.
*/
:root{--navy:#082a43;--navy2:#0d3c5c;--teal:#0b8f91;--teal2:#35b8b1;--gold:#c89b3c;--ink:#163244;--muted:#637889;--bg:#f5f8fa;--white:#fff;--line:#dfe9ee;--shadow:0 18px 50px rgba(8,42,67,.10);--radius:24px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;overflow-x:hidden;font-family:Tahoma,"Vazirmatn",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.9}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container{width:min(1160px,92%);margin:auto}.topbar{background:var(--navy);color:#dbeaf2;font-size:13px}.topbar .inner{display:flex;justify-content:space-between;gap:20px;padding:8px 0}.header{background:rgba(255,255,255,.96);position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:78px}.brand{display:flex;align-items:center;gap:14px}.brandmark{width:50px;height:50px;border-radius:16px;background:linear-gradient(145deg,var(--teal),var(--navy));display:grid;place-items:center;color:white;font-weight:900;box-shadow:0 10px 24px rgba(11,143,145,.25)}.brandtext strong{display:block;color:var(--navy);font-size:19px}.brandtext span{display:block;color:var(--muted);font-size:11px}.logo-img{max-height:58px;width:auto}.menu{display:flex;gap:5px;align-items:center;flex-wrap:wrap}.menu-group{position:relative}.menu-group>a{display:flex;align-items:center;gap:4px}.menu-arrow{font-size:13px}.submenu{display:none;position:absolute;right:0;top:100%;min-width:245px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:8px;box-shadow:var(--shadow);z-index:100}.menu-group:hover .submenu,.menu-group:focus-within .submenu{display:grid}.submenu a{display:block;padding:10px 12px!important;border-radius:10px}.submenu a:hover{background:#edf7f7;color:var(--teal)}.mobile-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:12px;padding:9px 12px;font-size:22px;line-height:1;cursor:pointer}.menu a{padding:9px 12px;border-radius:12px;font-size:14px;color:#365264}.menu a:hover{background:#edf7f7;color:var(--teal)}.navcta{background:var(--teal)!important;color:#fff!important;padding:10px 17px!important;border-radius:13px!important;box-shadow:0 8px 20px rgba(11,143,145,.22)}.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 85% 15%,rgba(53,184,177,.25),transparent 28%),linear-gradient(135deg,#06263e 0%,#0c4664 62%,#0a7778 100%);color:white;padding:82px 0 74px}.hero:after{content:"";position:absolute;inset:auto -10% -130px;height:260px;background:var(--bg);border-radius:50% 50% 0 0}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;position:relative;z-index:2}.eyebrow{display:inline-flex;gap:8px;align-items:center;color:#d7c48e;font-weight:700;font-size:13px;margin-bottom:16px}.eyebrow:before{content:"";width:28px;height:2px;background:var(--gold)}h1{font-size:clamp(34px,5vw,60px);line-height:1.2;margin:0 0 22px;letter-spacing:-1px}.hero p{font-size:18px;color:#dbeaf2;max-width:700px;margin:0 0 28px}.actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 21px;border-radius:15px;font-weight:800;border:1px solid transparent}.btn-primary{background:var(--gold);color:#152b36}.btn-light{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.08)}.hero-art{min-height:350px;border:1px solid rgba(255,255,255,.18);border-radius:34px;background:linear-gradient(145deg,rgba(255,255,255,.15),rgba(255,255,255,.04));display:flex;align-items:center;justify-content:center;box-shadow:0 30px 70px rgba(0,0,0,.18);padding:25px}.hero-art img{width:90%;filter:drop-shadow(0 20px 25px rgba(0,0,0,.2))}.trust-strip{margin-top:-34px;position:relative;z-index:5}.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.trust-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}.trust-card strong{display:block;color:var(--navy);font-size:21px}.trust-card span{font-size:13px;color:var(--muted)}section{padding:72px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}.section-head h2{font-size:32px;line-height:1.3;margin:0;color:var(--navy)}.section-head p{max-width:650px;margin:0;color:var(--muted)}.kicker{color:var(--teal);font-weight:900;font-size:13px;margin-bottom:6px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 10px 35px rgba(8,42,67,.06);transition:.2s}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.icon{width:52px;height:52px;border-radius:16px;background:#e9f7f6;display:grid;place-items:center;color:var(--teal);font-size:25px;margin-bottom:17px}.card h3{margin:0 0 9px;color:var(--navy);font-size:20px}.card p{color:var(--muted);font-size:14px;margin:0 0 15px}.link{color:var(--teal);font-weight:800;font-size:13px}.brand-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.brand-card{background:white;border:1px solid var(--line);border-radius:20px;padding:22px;min-height:125px;display:flex;flex-direction:column;justify-content:space-between}.brand-card strong{font-size:21px;color:var(--navy)}.brand-card small{color:var(--muted)}.feature{background:linear-gradient(135deg,#fff,#eef8f8);border:1px solid #d8eceb;border-radius:32px;padding:38px}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}.checklist{display:grid;gap:12px;margin-top:18px}.check{display:flex;gap:10px;align-items:flex-start;background:#fff;border:1px solid var(--line);padding:12px 14px;border-radius:14px}.check b{color:var(--teal)}.cta{background:linear-gradient(135deg,var(--navy),#0a6670);color:#fff;border-radius:32px;padding:45px}.cta h2{font-size:34px;margin:0 0 12px}.cta p{color:#d6e7ed;max-width:720px}.footer{background:#061e30;color:#bcd0da;padding:50px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}.footer h3{color:white;margin-top:0}.footer a:hover{color:white}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:35px;padding-top:16px;font-size:12px}.page-hero{background:linear-gradient(135deg,#082a43,#0a7778);color:white;padding:62px 0}.page-hero h1{font-size:44px}.breadcrumb{font-size:12px;color:#cfe2e9;margin-bottom:15px}.content-wrap{padding:50px 0}.content-layout{display:grid;grid-template-columns:1fr 300px;gap:25px}.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:36px;box-shadow:var(--shadow)}.article h2{color:var(--navy);margin-top:34px}.article h3{color:var(--teal);margin-top:25px}.article p,.article li{font-size:16px}.side{display:grid;gap:15px;align-content:start}.side-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px}.side-card h3{margin-top:0;color:var(--navy);font-size:17px}.pill{display:inline-block;padding:6px 10px;background:#eef7f7;border-radius:999px;color:var(--teal);font-size:12px;margin:3px}.product-hero{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;align-items:center;background:linear-gradient(135deg,#f0f8f8,#fff);border:1px solid var(--line);padding:28px;border-radius:28px;margin-bottom:28px}.product-hero img{max-height:270px;margin:auto}.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.spec{background:#f7fafb;border:1px solid var(--line);border-radius:16px;padding:15px}.spec strong{display:block;color:var(--navy)}.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq summary{font-weight:800;color:var(--navy);cursor:pointer}.notice{border-right:4px solid var(--gold);background:#fff9ec;padding:18px 20px;border-radius:14px;margin:20px 0}.tagline{color:var(--gold);font-weight:900}.wp-caption-text{font-size:12px;color:var(--muted)}@media(max-width:900px){.hero-grid,.feature-grid,.content-layout,.product-hero{grid-template-columns:1fr}.trust-grid{grid-template-columns:repeat(2,1fr)}.cards{grid-template-columns:1fr 1fr}.brand-grid{grid-template-columns:repeat(3,1fr)}.mobile-toggle{display:block}.menu{display:none;position:absolute;top:78px;right:4%;left:4%;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.menu.open{display:flex}.menu-group{width:100%}.menu-group>a{justify-content:space-between}.submenu{position:static;display:block;box-shadow:none;border:0;border-top:1px solid var(--line);border-radius:0;padding:4px 0 0;margin-top:4px;background:#fafcfd}.submenu a{padding:10px 16px!important}.menu a{padding:13px 14px}.footer-grid{grid-template-columns:1fr 1fr}}@media(max-width:600px){.hero{padding:55px 0}.hero-art{min-height:250px}.trust-grid,.cards,.brand-grid,.specs,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:10px}.article{padding:22px}h1{font-size:36px}}


/* V17.1 navigation and content polish */
.skip-link{position:fixed;top:-100px;right:18px;z-index:9999;background:#fff;color:#0b3150;padding:10px 14px;border-radius:10px;box-shadow:0 8px 25px rgba(0,0,0,.14);font-weight:700}.skip-link:focus{top:12px}
.sina-breadcrumbs{max-width:1180px;margin:0 auto;padding:14px 20px 0;display:flex;gap:9px;align-items:center;font-size:.88rem;color:#64748b}.sina-breadcrumbs a{color:#0b7285;text-decoration:none}.sina-breadcrumbs a:hover{text-decoration:underline}.sina-breadcrumbs span:last-child{color:#334155}
@media(max-width:700px){.sina-breadcrumbs{padding:12px 16px 0;font-size:.82rem;overflow:hidden;white-space:nowrap}.sina-breadcrumbs span:last-child{overflow:hidden;text-overflow:ellipsis}}

.search-page-form{display:flex;gap:10px;margin-bottom:28px}.search-page-form input{flex:1;border:1px solid var(--line);border-radius:14px;padding:13px 15px;font-family:inherit;font-size:15px;outline:none}.search-page-form input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(11,143,145,.10)}.search-page-form .btn{border:0;cursor:pointer;font-family:inherit}.catalog-intro{background:#eef8f8;border:1px solid #d8eceb;border-radius:18px;padding:18px 20px;margin-bottom:26px}.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:900px){.search-page-form{flex-direction:column}}


/* V17.3 responsive navigation */
.site-search{display:flex;align-items:center;gap:5px;min-width:0;margin-right:2px}.site-search input{width:150px;max-width:100%;min-width:0;border:1px solid var(--line);border-radius:11px;padding:8px 10px;font-family:inherit;font-size:13px;outline:none;background:#fff}.site-search input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(11,143,145,.08)}.site-search button{border:0;background:var(--navy);color:#fff;border-radius:10px;width:35px;height:35px;cursor:pointer;font-size:18px;flex:0 0 auto}.menu>.site-search{margin-top:0}
@media(max-width:1100px){.nav{gap:12px}.brandtext strong{font-size:17px}.menu{gap:2px}.menu a{padding:8px 9px;font-size:13px}.site-search input{width:120px}}
@media(max-width:900px){.nav{position:relative;min-height:78px}.brand{min-width:0;flex:1}.brandtext{min-width:0}.brandtext strong,.brandtext span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mobile-toggle{flex:0 0 auto}.menu{top:78px;right:0;left:0;width:100%;max-width:100%;max-height:calc(100vh - 88px);overflow-y:auto;overflow-x:hidden}.menu>.site-search{width:100%;padding:8px 4px 4px;border-top:1px solid var(--line);margin-top:6px}.menu>.site-search input{width:100%;flex:1}.menu>.site-search button{width:42px;height:42px}.menu-group,.menu-group>a,.submenu,.submenu a{max-width:100%;overflow-wrap:anywhere}.submenu{width:100%}}
@media(max-width:600px){.container{width:calc(100% - 28px)}.topbar .inner{display:block;text-align:center;padding:7px 0}.topbar .inner span{display:block}.topbar .inner span+span{display:none}.brand{gap:9px}.brandmark{width:44px;height:44px;border-radius:13px}.brandtext strong{font-size:14px}.brandtext span{font-size:9px}.mobile-toggle{padding:8px 10px;font-size:20px}.menu{border-radius:0 0 18px 18px}.menu a{font-size:14px;padding:12px 13px}.submenu a{font-size:13px;padding:10px 14px!important}.header{overflow:visible}.site-search input{font-size:14px}}


/* =========================================================
   SINA V18 — Signature Vision visual redesign
   Content and URLs remain unchanged; this layer redesigns
   the visual experience while keeping the theme lightweight.
   ========================================================= */
:root{--v18-ink:#102d3f;--v18-deep:#071f33;--v18-teal:#0c8f91;--v18-mint:#dff5f2;--v18-gold:#c9a45a;--v18-paper:#f6f9f8;--v18-white:#fff;--v18-line:rgba(16,45,63,.10);--v18-shadow:0 22px 70px rgba(7,31,51,.11)}
body{font-family:"Vazirmatn",Tahoma,Arial,sans-serif;background:var(--v18-paper);color:var(--v18-ink)}
.topbar{background:linear-gradient(90deg,#061d30,#0a4155,#061d30);border:0}
.header{background:rgba(255,255,255,.90);box-shadow:0 8px 35px rgba(7,31,51,.06);border-bottom:1px solid rgba(255,255,255,.8)}
.nav{min-height:88px}.brand{gap:12px}.brandmark{background:linear-gradient(145deg,#0c8f91,#071f33);border-radius:18px}.logo-img{max-height:62px;max-width:210px;object-fit:contain}.brandtext strong{font-size:18px;letter-spacing:-.3px}.brandtext span{font-size:11px}
.menu>a,.menu-group>a{font-weight:700;color:#29485b}.menu a:hover{background:#e8f6f4;color:var(--v18-teal)}.navcta{background:linear-gradient(135deg,#0c8f91,#076e75)!important;border-radius:999px!important;padding:10px 18px!important}
.submenu{border-radius:18px;box-shadow:0 24px 60px rgba(7,31,51,.15);border-color:rgba(16,45,63,.08);padding:10px}.submenu a:hover{background:#e8f6f4}
.site-search input{border-radius:999px;background:#f5f8f8}.site-search button{border-radius:50%;background:var(--v18-deep)}
.hero{padding:104px 0 118px;background:radial-gradient(circle at 18% 20%,rgba(78,206,193,.18),transparent 26%),radial-gradient(circle at 83% 15%,rgba(201,164,90,.18),transparent 22%),linear-gradient(135deg,#061e31 0%,#073b54 55%,#087f80 100%)}
.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 120%,transparent 0 35%,rgba(255,255,255,.035) 36% 36.4%,transparent 37% 100%);pointer-events:none}
.hero:after{height:170px;bottom:-100px;background:var(--v18-paper);border-radius:50% 50% 0 0}
.hero-grid{grid-template-columns:1.05fr .95fr;gap:70px}.eyebrow{letter-spacing:.2px}.hero h1{font-size:clamp(40px,5.6vw,72px);letter-spacing:-2px}.hero p{font-size:19px;line-height:2;color:#dcecf0}
.hero-art{min-height:390px;border-radius:42% 18% 42% 18%;border:1px solid rgba(255,255,255,.20);background:linear-gradient(145deg,rgba(255,255,255,.16),rgba(255,255,255,.035));box-shadow:0 35px 100px rgba(0,0,0,.25);transform:rotate(1.5deg)}.hero-art img{transform:rotate(-1.5deg);width:86%}
.actions .btn{border-radius:999px;padding:14px 24px}.btn-primary{background:linear-gradient(135deg,#d7b46a,#b88d3f);box-shadow:0 12px 30px rgba(201,164,90,.22)}
.trust-strip{margin-top:-42px}.trust-grid{gap:0;grid-template-columns:repeat(4,1fr)}.trust-card{border-radius:0;padding:24px 22px;box-shadow:0 15px 45px rgba(7,31,51,.08);border-left:0}.trust-card:first-child{border-radius:22px 0 0 22px}.trust-card:last-child{border-radius:0 22px 22px 0}.trust-card strong{font-size:18px}
section{padding:88px 0}.section-head{margin-bottom:34px}.kicker{display:flex;align-items:center;gap:10px;text-transform:none;letter-spacing:.2px}.kicker:before{content:"";width:34px;height:2px;background:var(--v18-gold);display:inline-block}.section-head h2{font-size:clamp(27px,3.5vw,40px);letter-spacing:-.8px}
.cards{gap:20px}.card{position:relative;overflow:hidden;border-radius:28px;border:1px solid rgba(16,45,63,.08);box-shadow:0 12px 45px rgba(7,31,51,.055);padding:29px;transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}.card:before{content:"";position:absolute;top:0;right:0;width:90px;height:90px;background:radial-gradient(circle at 100% 0,rgba(12,143,145,.12),transparent 68%);pointer-events:none}.card:hover{transform:translateY(-7px);box-shadow:0 25px 65px rgba(7,31,51,.12);border-color:rgba(12,143,145,.20)}.icon{border-radius:18px;background:linear-gradient(145deg,#e4f7f3,#f3fbfa);color:var(--v18-teal);box-shadow:inset 0 0 0 1px rgba(12,143,145,.06)}
.brand-grid{gap:16px}.brand-card{border-radius:24px;min-height:140px;box-shadow:0 10px 35px rgba(7,31,51,.045);transition:.25s}.brand-card:hover{transform:translateY(-5px);border-color:rgba(12,143,145,.25);box-shadow:0 20px 50px rgba(7,31,51,.10)}
.feature{border-radius:40px;padding:48px;background:linear-gradient(135deg,#fff 10%,#eaf7f5 100%);box-shadow:var(--v18-shadow);border:1px solid rgba(12,143,145,.09);position:relative;overflow:hidden}.feature:after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;left:-130px;bottom:-160px;background:rgba(201,164,90,.10);pointer-events:none}.check{border-radius:17px;background:rgba(255,255,255,.84)}
.cta{border-radius:42px;padding:58px;background:radial-gradient(circle at 85% 15%,rgba(201,164,90,.18),transparent 25%),linear-gradient(135deg,#061e31,#087779);box-shadow:0 28px 80px rgba(7,31,51,.18)}
.page-hero{padding:76px 0;background:radial-gradient(circle at 80% 20%,rgba(78,206,193,.15),transparent 25%),linear-gradient(135deg,#061e31,#0b5366)}.page-hero h1{font-size:clamp(34px,5vw,56px)}.content-wrap{padding:58px 0}.article{border-radius:32px;padding:42px;box-shadow:var(--v18-shadow);border-color:rgba(16,45,63,.08)}.side-card{border-radius:24px;box-shadow:0 10px 35px rgba(7,31,51,.06);border-color:rgba(16,45,63,.08)}
.footer{background:linear-gradient(145deg,#041927,#072d43);position:relative}.footer:before{content:"";display:block;height:1px;background:linear-gradient(90deg,transparent,rgba(201,164,90,.55),transparent);position:absolute;top:0;left:10%;right:10%}
/* visual rhythm for long knowledge pages */
.article h2{font-size:28px;padding-right:14px;border-right:3px solid var(--v18-teal);margin-top:42px}.article h3{font-size:21px}.article blockquote{border-right:4px solid var(--v18-gold);background:#fffaf0;border-radius:16px;padding:16px 20px;margin:24px 0}
@media(max-width:1100px){.menu a{padding:8px 7px}.brandtext strong{font-size:16px}.hero-grid{gap:42px}}
@media(max-width:900px){.hero{padding:72px 0 92px}.hero-grid{grid-template-columns:1fr}.hero-art{max-width:620px;margin:auto;min-height:300px}.trust-grid{grid-template-columns:1fr 1fr}.trust-card:first-child{border-radius:20px 0 0 0}.trust-card:nth-child(2){border-radius:0 20px 0 0}.trust-card:nth-child(3){border-radius:0 0 0 20px}.trust-card:last-child{border-radius:0 0 20px 0}.feature{padding:34px;border-radius:30px}}
@media(max-width:600px){.logo-img{max-height:52px;max-width:150px}.brandtext strong{font-size:13px}.brandtext span{font-size:9px}.hero h1{font-size:39px}.hero p{font-size:17px}.hero-art{min-height:230px;border-radius:32px}.trust-grid{grid-template-columns:1fr}.trust-card,.trust-card:first-child,.trust-card:nth-child(2),.trust-card:nth-child(3),.trust-card:last-child{border-radius:0}.trust-card:first-child{border-radius:20px 20px 0 0}.trust-card:last-child{border-radius:0 0 20px 20px}.feature{padding:26px;border-radius:25px}.article{padding:25px}}

/* =========================================================
   SINA V19 — TRUE SIGNATURE REDESIGN
   Homepage visual system; existing content/pages preserved.
   ========================================================= */
.v19-hero{position:relative;overflow:hidden;padding:88px 0 125px;background:#071f33;color:#fff;isolation:isolate}.v19-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:55px}.v19-hero-copy{max-width:720px}.v19-overline{display:flex;align-items:center;gap:10px;color:#b9d9da;font-size:13px;font-weight:800;margin-bottom:24px}.v19-overline span{width:38px;height:2px;background:#d3ad62}.v19-hero h1{font-size:clamp(43px,5.8vw,78px);line-height:1.08;letter-spacing:-2.8px;margin:0 0 24px}.v19-hero h1 em{font-style:normal;color:#d6b56e}.v19-hero-copy>p{font-size:18px;line-height:2.05;color:#d8e8ec;max-width:650px;margin-bottom:30px}.v19-actions{display:flex;gap:12px;flex-wrap:wrap}.v19-btn{display:inline-flex;align-items:center;justify-content:center;gap:16px;border-radius:999px;padding:14px 23px;font-weight:900;text-decoration:none;transition:.25s}.v19-btn b{font-size:20px}.v19-btn-gold{background:linear-gradient(135deg,#e0bf78,#b78a3d);color:#112638;box-shadow:0 14px 35px rgba(208,171,95,.22)}.v19-btn-gold:hover{transform:translateY(-3px);box-shadow:0 20px 45px rgba(208,171,95,.3)}.v19-btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06)}.v19-btn-ghost:hover{background:rgba(255,255,255,.12)}.v19-proof{display:flex;align-items:center;gap:24px;margin-top:44px}.v19-proof div{display:flex;flex-direction:column;gap:3px}.v19-proof strong{font-size:17px;color:#fff}.v19-proof span{font-size:11px;color:#9dbbc2}.v19-proof i{width:1px;height:32px;background:rgba(255,255,255,.17)}.v19-hero-visual{min-height:470px;position:relative;display:grid;place-items:center}.v19-hero-orb{position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}.orb-one{width:390px;height:390px;right:-100px;top:-180px;background:rgba(29,175,171,.16)}.orb-two{width:270px;height:270px;left:-100px;bottom:-170px;background:rgba(214,181,110,.13)}.v19-visual-ring{position:absolute;border:1px solid rgba(164,229,224,.17);border-radius:50%}.ring-a{width:430px;height:430px}.ring-b{width:330px;height:330px;border-color:rgba(214,181,110,.24)}.v19-ear-card{width:320px;height:390px;border-radius:48% 48% 35% 35%;background:linear-gradient(145deg,#e8f7f4,#a9d9d4);color:#0b3343;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 35px 90px rgba(0,0,0,.28),inset 0 0 0 1px rgba(255,255,255,.6);transform:rotate(4deg)}.v19-sound-wave{font-size:70px;letter-spacing:-18px;color:#087f80;line-height:1;margin-left:-20px}.v19-ear-title{text-align:center;font-size:25px;line-height:1.3;margin-top:22px}.v19-ear-title b{color:#087f80}.v19-ear-caption{font-size:11px;margin-top:15px;color:#4b7379}.v19-floating-card{position:absolute;background:rgba(255,255,255,.95);color:#123246;border-radius:16px;padding:14px 18px;box-shadow:0 18px 45px rgba(0,0,0,.2);display:flex;flex-direction:column;gap:4px;min-width:175px}.v19-floating-card b{font-size:13px}.v19-floating-card span{font-size:10px;color:#688089}.float-top{top:35px;right:0}.float-bottom{bottom:42px;left:0}.v19-wave{position:absolute;z-index:1;left:-5%;right:-5%;bottom:-1px;height:75px;background:#f6f9f8;border-radius:50% 50% 0 0/100% 100% 0 0;transform:rotate(-1deg)}
.v19-intro{padding:76px 0 72px;background:#f6f9f8}.v19-intro-grid{display:grid;grid-template-columns:130px 1fr 90px;gap:38px;align-items:center}.v19-section-label{display:flex;flex-direction:column;gap:10px;color:#0b8b8b;font-size:13px}.v19-section-label span{font-family:Georgia,serif;font-size:34px;color:#c6a05a}.v19-intro h2{font-size:clamp(28px,3.8vw,46px);line-height:1.4;margin:0 0 12px;letter-spacing:-1px}.v19-intro h2 strong{color:#087f80}.v19-intro p{max-width:800px;line-height:2;color:#60747c;margin:0}.v19-circle-link{width:88px;height:88px;border-radius:50%;display:grid;place-items:center;text-align:center;background:#0b8182;color:#fff;text-decoration:none;font-size:12px;line-height:1.5;box-shadow:0 15px 35px rgba(11,129,130,.22)}.v19-circle-link b{font-size:18px}.v19-services{padding:92px 0;background:#fff}.v19-heading-row,.v19-brands-head{display:flex;justify-content:space-between;gap:35px;align-items:end;margin-bottom:38px}.v19-mini{font-size:12px;font-weight:900;color:#0b8b8b;letter-spacing:.4px;margin-bottom:10px}.v19-heading-row h2,.v19-brands h2{font-size:clamp(28px,3.6vw,43px);margin:0;letter-spacing:-1px}.v19-heading-row>p{max-width:460px;margin:0;color:#71838a;line-height:1.9}.v19-service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.v19-service-card{position:relative;min-height:330px;padding:29px;border-radius:28px;text-decoration:none;overflow:hidden;display:flex;flex-direction:column;transition:.3s;box-shadow:0 12px 40px rgba(13,45,59,.07)}.v19-service-card:hover{transform:translateY(-8px);box-shadow:0 25px 60px rgba(13,45,59,.14)}.v19-service-card .num{position:absolute;left:25px;top:23px;font:700 12px Georgia,serif;opacity:.5}.v19-icon{width:55px;height:55px;border-radius:18px;display:grid;place-items:center;font-size:24px;margin-bottom:34px}.v19-service-card h3{font-size:21px;margin:0 0 12px}.v19-service-card p{font-size:13px;line-height:2;color:inherit;opacity:.78;margin:0}.v19-service-card .more{margin-top:auto;font-size:12px;font-weight:900}.card-teal{background:#dff4f1;color:#103d4a}.card-teal .v19-icon{background:#fff;color:#0b8b8b}.card-dark{background:#0a2b40;color:#fff}.card-dark .v19-icon{background:#164a60;color:#b8e4e0}.card-gold{background:#e9ddc3;color:#3b2e19}.card-gold .v19-icon{background:#fff8e9;color:#9d742e}.card-light{background:#f3f6f4;color:#173746}.card-light .v19-icon{background:#fff;color:#0b8b8b}
.v19-about{padding:100px 0;background:#eef4f2}.v19-about-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:70px;align-items:center}.v19-about-visual{min-height:490px;border-radius:40px;background:linear-gradient(145deg,#0b6571,#062a3d);position:relative;overflow:hidden;box-shadow:0 30px 75px rgba(6,42,61,.18);display:flex;align-items:end;padding:42px;color:#fff}.v19-about-visual:before,.v19-about-visual:after{content:"";position:absolute;border:1px solid rgba(211,173,98,.3);border-radius:50%}.v19-about-visual:before{width:430px;height:430px;right:-190px;top:-120px}.v19-about-visual:after{width:280px;height:280px;left:-140px;bottom:-160px}.v19-years{position:absolute;top:42px;right:42px;display:flex;flex-direction:column}.v19-years strong{font-size:80px;line-height:.9;color:#d5b16a}.v19-years span{font-size:11px;color:#c2d8da;margin-top:10px}.v19-quote-mark{position:absolute;left:40px;top:45px;font:120px Georgia,serif;color:rgba(255,255,255,.12)}.v19-about-visual p{font-size:21px;line-height:1.9;max-width:410px;position:relative;z-index:2}.v19-about-copy h2{font-size:clamp(30px,4vw,49px);line-height:1.45;margin:0 0 20px;letter-spacing:-1.2px}.v19-about-copy h2 span{color:#0b8989}.v19-about-copy>p{line-height:2;color:#65777e}.v19-about-copy ul{list-style:none;padding:0;margin:28px 0}.v19-about-copy li{display:flex;gap:12px;align-items:center;margin:13px 0;font-size:14px}.v19-about-copy li b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#d9f0ed;color:#087f80;font-size:12px}.v19-text-link{display:inline-flex;gap:12px;align-items:center;color:#087f80;font-weight:900;text-decoration:none;font-size:13px}.v19-text-link b{font-size:20px}.v19-knowledge{padding:100px 0;background:#fff}.v19-outline{border:1px solid #d5dfdc;padding:11px 18px;border-radius:999px;color:#173746;text-decoration:none;font-size:12px;font-weight:900}.v19-knowledge-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;grid-template-rows:1fr 1fr;gap:15px}.v19-knowledge-card{padding:28px;border-radius:26px;background:#f2f6f4;text-decoration:none;color:#173746;display:flex;flex-direction:column;min-height:180px;transition:.25s}.v19-knowledge-card:hover{transform:translateY(-5px);box-shadow:0 20px 45px rgba(16,50,65,.09)}.v19-knowledge-card.large{grid-row:span 2;background:linear-gradient(145deg,#07384d,#0b8182);color:#fff;min-height:390px;justify-content:end}.v19-knowledge-card .tag{font-size:10px;font-weight:900;color:#0b8b8b;margin-bottom:14px}.v19-knowledge-card.large .tag{color:#d8bd7d}.v19-knowledge-card h3{font-size:20px;line-height:1.6;margin:0 0 8px}.v19-knowledge-card p{font-size:12px;line-height:1.9;opacity:.72;margin:0}.v19-knowledge-card span{margin-top:auto;padding-top:20px;font-size:11px;font-weight:900}.v19-brands{padding:80px 0;background:#f5f8f6}.v19-brand-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.v19-brand-strip a{background:#fff;border:1px solid #e4ebe8;border-radius:18px;padding:18px 15px;display:flex;flex-direction:column;gap:5px;text-decoration:none;color:#193847;transition:.2s}.v19-brand-strip a:hover{border-color:#a7d7d2;transform:translateY(-3px)}.v19-brand-strip strong{font-size:14px}.v19-brand-strip small{font-size:10px;color:#829399}.v19-final{padding:80px 0;background:#071f33;color:#fff}.v19-final-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}.v19-final h2{font-size:clamp(30px,4vw,50px);line-height:1.4;margin:0 0 10px}.v19-final h2 span{color:#d5b16a}.v19-final p{color:#a9c1c7;margin:0}.v19-final .v19-btn{flex:0 0 auto}
@media(max-width:1000px){.v19-hero-inner{grid-template-columns:1fr}.v19-hero-copy{max-width:800px}.v19-hero-visual{min-height:390px;max-width:620px;width:100%;margin:auto}.v19-service-grid{grid-template-columns:1fr 1fr}.v19-about-grid{grid-template-columns:1fr}.v19-about-visual{min-height:390px}.v19-brand-strip{grid-template-columns:repeat(4,1fr)}.v19-knowledge-grid{grid-template-columns:1fr 1fr}.v19-knowledge-card.large{grid-row:span 2}}
@media(max-width:700px){.v19-hero{padding:62px 0 105px}.v19-hero h1{font-size:42px}.v19-hero-copy>p{font-size:16px}.v19-proof{gap:13px;justify-content:space-between}.v19-proof i{display:none}.v19-hero-visual{min-height:330px}.v19-ear-card{width:235px;height:300px}.v19-floating-card{min-width:145px;padding:11px 13px}.float-top{right:0;top:15px}.float-bottom{left:0;bottom:10px}.v19-intro-grid{grid-template-columns:1fr;gap:18px}.v19-circle-link{width:70px;height:70px}.v19-heading-row,.v19-brands-head{display:block}.v19-heading-row>p{margin-top:15px}.v19-service-grid{grid-template-columns:1fr}.v19-service-card{min-height:270px}.v19-about{padding:70px 0}.v19-about-visual{min-height:350px;padding:28px;border-radius:28px}.v19-years{top:28px;right:28px}.v19-years strong{font-size:65px}.v19-about-visual p{font-size:18px}.v19-knowledge-grid{grid-template-columns:1fr}.v19-knowledge-card.large{grid-row:auto;min-height:330px}.v19-brand-strip{grid-template-columns:1fr 1fr}.v19-final-inner{display:block}.v19-final .v19-btn{margin-top:28px}.v19-wave{height:48px}}
/* V20 — mobile navigation + encyclopedia polish */
.mobile-subtoggle{display:none}
.v20-card-grid{margin:22px 0 30px}
.v20-card{position:relative;overflow:hidden}
.v20-card:before{content:"";position:absolute;right:0;top:0;width:5px;height:100%;background:linear-gradient(#0b8f91,#c89b3c);opacity:.75}
.v20-card-kicker{display:inline-block;font-size:11px;font-weight:900;color:#0b8f91;background:#edf8f7;padding:4px 9px;border-radius:999px;margin-bottom:12px}
.v20-faq details{background:#f8fbfb;border:1px solid var(--line);border-radius:15px;padding:15px 18px;margin:10px 0}
.v20-faq details summary{outline:none}
.expert-note{display:grid;gap:12px;margin:22px 0}
.expert-note>div{display:grid;grid-template-columns:48px 1fr;gap:15px;align-items:start;background:linear-gradient(135deg,#f1f8f7,#fff);border:1px solid #dbe9e7;border-radius:18px;padding:17px}
.expert-note strong{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#0b8f91;color:#fff}
.expert-note p{margin:0;color:#536d77}
.sina-v20-note{border:1px solid #d6e7e5;background:#f2faf9;border-radius:18px;padding:18px}
@media(max-width:900px){
 .menu-group{border-bottom:1px solid #edf1f3}
 .menu-group>a{padding-left:46px!important;position:relative}
 .mobile-subtoggle{display:grid;place-items:center;position:absolute;left:8px;top:7px;width:36px;height:36px;border:0;border-radius:10px;background:#f1f7f7;color:#0b7f80;font-size:20px;cursor:pointer;z-index:2}
 .menu-group.submenu-open>.submenu{display:grid}
 .menu-group.submenu-open>.menu-group>a{color:#0b8f91;background:#f5fbfb}
 .submenu{display:none;margin:0 8px 8px;border-top:0;background:#f8fbfb;border-radius:12px;padding:5px}
 .submenu a{padding:10px 12px!important;font-size:13px!important}
 .site-search{margin:7px 0 2px;width:100%;display:flex}
 .site-search input{flex:1;min-width:0}
 .menu.open{max-height:calc(100vh - 95px);overflow:auto}
}
@media(max-width:600px){.page-hero{padding:48px 0}.page-hero h1{font-size:34px}.content-wrap{padding:30px 0}.article p,.article li{font-size:15px}.v20-card-grid{gap:12px}.expert-note>div{grid-template-columns:40px 1fr}}
/* =========================================================
   V21 — visible knowledge base / encyclopedia
   ========================================================= */
.v21-ency-hero{background:linear-gradient(135deg,#06273a,#0b7f80);color:#fff;border-radius:30px;padding:38px 34px;margin-bottom:28px;position:relative;overflow:hidden;box-shadow:0 22px 65px rgba(6,39,58,.16)}
.v21-ency-hero:after{content:"";position:absolute;width:260px;height:260px;border:1px solid rgba(255,255,255,.14);border-radius:50%;left:-80px;bottom:-150px}.v21-ency-hero span{color:#dfc47e;font-size:12px;font-weight:900}.v21-ency-hero h2{font-size:clamp(28px,4vw,46px);margin:12px 0 10px}.v21-ency-hero p{max-width:850px;line-height:2;color:#d9eeee;margin:0}.v21-ency-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:25px 0 35px}.v21-ency-card{display:flex;flex-direction:column;min-height:185px;text-decoration:none;color:#173746;background:#fff;border:1px solid #e0eae8;border-radius:23px;padding:24px;box-shadow:0 10px 35px rgba(7,31,51,.055);transition:.25s;position:relative;overflow:hidden}.v21-ency-card:before{content:"";position:absolute;right:0;top:0;width:5px;height:100%;background:linear-gradient(#0b8f91,#c8a157)}.v21-ency-card:hover{transform:translateY(-6px);box-shadow:0 22px 50px rgba(7,31,51,.11);border-color:#b8dcd8}.v21-ency-card span{font-size:11px;color:#0b8f91;font-weight:900;margin-bottom:12px}.v21-ency-card h3{font-size:18px;line-height:1.65;margin:0}.v21-ency-card b{margin-top:auto;padding-top:20px;color:#0b7f80;font-size:12px}.v21-cat-intro{background:#eef8f7;border:1px solid #d8ebe8;border-radius:17px;padding:16px 18px;margin:20px 0;color:#48646d}.v21-cat-intro strong{color:#0b7f80}
@media(max-width:850px){.v21-ency-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.v21-ency-grid{grid-template-columns:1fr}.v21-ency-card{min-height:155px;padding:20px}.v21-ency-hero{padding:28px 22px;border-radius:23px}}

/* V22 — refined desktop typography */
@media (min-width:901px){
 .page-hero h1{font-size:40px;line-height:1.35;letter-spacing:-.5px}
 .article h2{font-size:25px;line-height:1.55;font-weight:800;letter-spacing:-.25px}
 .article h3{font-size:19px;line-height:1.6;font-weight:800}
 .section-head h2{font-size:29px}
}
@media (min-width:701px) and (max-width:900px){
 .page-hero h1{font-size:38px}
 .article h2{font-size:24px}
}


/* V23 — calmer, more elegant knowledge-page typography */
@media (min-width:901px){
 .page-hero h1{font-size:36px;line-height:1.45;letter-spacing:-.35px}
 .article h2{font-size:22px;line-height:1.65;font-weight:800;letter-spacing:-.15px;margin-top:36px}
 .article h3{font-size:18px;line-height:1.7;font-weight:800}
 .section-head h2{font-size:27px;line-height:1.55}
}
@media (min-width:701px) and (max-width:900px){
 .page-hero h1{font-size:34px}
 .article h2{font-size:22px}
 .article h3{font-size:18px}
}

/* V29 — editable content / featured images */
.v29-card-image{display:block;margin:-4px -4px 14px;border-radius:16px 16px 10px 10px;overflow:hidden;aspect-ratio:16/9;background:#f2f5f7}
.v29-card-image img{display:block;width:100%;height:100%;object-fit:cover}
.article .featured-image{margin:0 0 24px;border-radius:18px;overflow:hidden}
.article .featured-image img{display:block;width:100%;height:auto;max-height:460px;object-fit:cover}