/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;line-height:1.6}
body{font-family:'Merriweather','Noto Serif SC',Georgia,'Times New Roman',serif;color:#2D3748;background:#F5F8F6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#2A7F6E;text-decoration:none;transition:color .2s}
a:hover{color:#E8A34B}
a:focus-visible{outline:2px solid #E8A34B;outline-offset:2px;border-radius:2px}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-family:'Nunito','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;font-weight:700;color:#1A3C34;line-height:1.3}
::selection{background:#2A7F6E;color:#fff}
:focus-visible{outline:2px solid #E8A34B;outline-offset:2px}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}html{scroll-behavior:auto}}

/* ===== CSS VARIABLES ===== */
:root{
  --color-primary:#2A7F6E;
  --color-accent:#E8A34B;
  --color-deep:#1B5E4A;
  --color-bg:#F5F8F6;
  --color-text:#2D3748;
  --color-heading:#1A3C34;
  --color-border:#C8E6D9;
  --color-link:#F0A050;
  --color-white:#fff;
  --color-black:#1a1a1a;
  --color-primary-transparent:rgba(42,127,110,0.08);
  --font-heading:'Nunito','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Merriweather','Noto Serif SC',Georgia,'Times New Roman',serif;
  --font-accent:'Nunito',sans-serif;
  --container-max:1200px;
  --header-height:72px;
  --radius-sm:4px;
  --radius-md:8px;
  --shadow-card:0 2px 8px rgba(26,60,52,0.08);
  --shadow-card-hover:0 6px 20px rgba(26,60,52,0.14);
  --transition-base:0.25s ease;
}

/* ===== SKIP LINK ===== */
.skip-link{position:fixed;top:-100px;left:16px;z-index:10000;padding:12px 24px;background:#1A3C34;color:#fff;font-family:var(--font-accent);font-weight:600;font-size:0.9rem;border-radius:0 0 var(--radius-sm) var(--radius-sm);transition:top .3s ease}
.skip-link:focus{top:0;outline:2px solid #E8A34B;outline-offset:2px}

/* ===== SCROLL BAR ===== */
.scroll-bar{position:fixed;top:0;left:0;z-index:9999;width:0%;height:3px;background:linear-gradient(90deg,var(--color-accent),var(--color-primary));transition:width 0.1s linear;pointer-events:none}
@media(prefers-reduced-motion:reduce){.scroll-bar{transition:none}}

/* ===== CONTAINER ===== */
.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 24px}
@media(min-width:768px){.container{padding:0 40px}}

/* ===== HEADER ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-height);background:transparent;transition:background .4s ease,box-shadow .4s ease;backdrop-filter:blur(0)}
.site-header[data-scrolled]{background:rgba(42,127,110,0.97);box-shadow:0 1px 0 var(--color-border);backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}

/* ===== BRAND LOGO ===== */
.brand-logo{display:flex;align-items:center;gap:8px;color:var(--color-white);text-decoration:none;transition:opacity .2s}
.brand-logo:hover{color:var(--color-white);opacity:0.85}
.brand-icon{flex-shrink:0;width:28px;height:28px;color:var(--color-white)}
.site-header[data-scrolled] .brand-icon{color:var(--color-white)}
.brand-text{font-family:var(--font-heading);font-weight:700;font-size:1.25rem;letter-spacing:0.5px;color:currentColor}

/* ===== NAV TOGGLE (mobile) ===== */
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;background:none;border:none;cursor:pointer;gap:5px;padding:8px;transition:transform .2s}
.nav-toggle:hover{transform:scale(1.05)}
.nav-toggle-line{display:block;width:24px;height:2.5px;background:var(--color-white);border-radius:2px;transition:transform .3s ease,opacity .3s ease;transform-origin:center}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ===== NAV PANEL ===== */
.nav-panel{display:flex;align-items:center;gap:32px}
.nav-list{display:flex;gap:24px}
.nav-link{font-family:var(--font-accent);font-weight:600;font-size:0.95rem;color:rgba(255,255,255,0.88);padding:6px 0;border-bottom:2px solid transparent;transition:color .2s,border-color .2s;white-space:nowrap}
.nav-link:hover{color:var(--color-white);border-bottom-color:var(--color-accent)}
.nav-link[aria-current="page"]{color:var(--color-white);border-bottom-color:var(--color-accent)}
.site-header[data-scrolled] .nav-link{color:rgba(255,255,255,0.9)}
.site-header[data-scrolled] .nav-link:hover{color:var(--color-white)}
.site-header[data-scrolled] .nav-link[aria-current="page"]{color:var(--color-white)}

/* ===== CTA BUTTON ===== */
.btn-cta{display:inline-flex;align-items:center;padding:10px 24px;font-family:var(--font-accent);font-weight:600;font-size:0.95rem;color:var(--color-white);background:var(--color-accent);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:background .2s,transform .2s,box-shadow .2s;text-decoration:none;white-space:nowrap}
.btn-cta:hover{background:#d4923f;transform:translateY(-1px);box-shadow:0 4px 12px rgba(232,163,75,0.35);color:var(--color-white)}
.btn-cta:active{transform:translateY(0)}
.btn-cta:focus-visible{outline:2px solid var(--color-white);outline-offset:2px}

/* ===== MOBILE NAV ===== */
@media(max-width:767px){
  .nav-toggle{display:flex}
  .nav-panel{position:fixed;top:var(--header-height);left:0;right:0;bottom:0;flex-direction:column;justify-content:flex-start;align-items:stretch;gap:0;background:rgba(27,94,74,0.98);backdrop-filter:blur(10px);padding:24px 32px 40px;transform:translateX(100%);transition:transform .35s ease;opacity:0;visibility:hidden;overflow-y:auto}
  .nav-panel[data-open]{transform:translateX(0);opacity:1;visibility:visible}
  .nav-list{flex-direction:column;gap:8px}
  .nav-link{font-size:1.1rem;padding:12px 0;border-bottom:1px solid rgba(255,255,255,0.12);display:block;color:rgba(255,255,255,0.85)}
  .nav-link:hover{color:var(--color-white);border-bottom-color:var(--color-accent)}
  .nav-panel .btn-cta{margin-top:24px;width:100%;text-align:center;justify-content:center}
}

/* ===== FOOTER ===== */
.site-footer{background:var(--color-deep);color:rgba(255,255,255,0.9);font-family:var(--font-accent);font-size:0.9rem;padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.footer-grid{grid-template-columns:1.5fr 1fr 1.4fr;gap:48px}}
.footer-logo{color:var(--color-white);margin-bottom:8px}
.footer-logo .brand-text{font-size:1.15rem}
.footer-tagline{color:rgba(255,255,255,0.65);font-size:0.85rem;margin-top:4px;font-family:var(--font-accent)}
.footer-heading{font-family:var(--font-heading);font-weight:700;font-size:1rem;color:var(--color-white);margin-bottom:16px;letter-spacing:0.3px;position:relative;padding-bottom:8px}
.footer-heading::after{content:'';display:block;width:28px;height:2.5px;background:var(--color-accent);border-radius:2px;position:absolute;bottom:0;left:0}
.footer-links ul{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:rgba(255,255,255,0.78);transition:color .2s,padding-left .2s;font-size:0.9rem}
.footer-links a:hover{color:var(--color-accent);padding-left:4px}
.footer-contact p{margin-bottom:6px;line-height:1.7}
.footer-contact a{color:rgba(255,255,255,0.88);transition:color .2s}
.footer-contact a:hover{color:var(--color-accent)}
.footer-note{grid-column:1/-1;padding:20px 0 0;border-top:1px solid rgba(255,255,255,0.12);color:rgba(255,255,255,0.65);font-size:0.85rem;line-height:1.7}
.footer-bottom{background:rgba(0,0,0,0.18);margin-top:24px;padding:18px 0}
.footer-icp{font-size:0.82rem;color:rgba(255,255,255,0.6);text-align:center;margin:0}
.footer-icp a{color:rgba(255,255,255,0.7)}
.footer-icp a:hover{color:var(--color-accent)}
@media(max-width:639px){
  .site-footer{padding:40px 0 0}
  .footer-grid{gap:32px}
  .footer-heading{margin-bottom:12px}
}

/* ===== HERO (shared base) ===== */
.hero{position:relative;min-height:85vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden;background:var(--color-primary)}
.hero .container{position:relative;z-index:2}
.hero-title{font-family:var(--font-heading);font-weight:700;font-size:clamp(2rem,5vw,3.4rem);color:var(--color-white);line-height:1.2;max-width:720px}
.hero-sub{font-family:var(--font-body);font-size:clamp(1rem,2vw,1.2rem);color:rgba(255,255,255,0.85);max-width:560px;margin-top:20px;line-height:1.7}
.hero-cta{margin-top:32px;display:inline-flex;gap:16px;flex-wrap:wrap}

/* ===== SECTION ===== */
.section{padding:80px 0}
@media(min-width:768px){.section{padding:100px 0}}
.section-title{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:16px}
.section-desc{font-family:var(--font-body);font-size:1rem;color:var(--color-text);max-width:680px;line-height:1.8;margin-bottom:32px}

/* ===== GRID ===== */
.grid-2col{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:640px){.grid-2col{grid-template-columns:1fr 1fr}}
.grid-3col{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:640px){.grid-3col{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.grid-3col{grid-template-columns:1fr 1fr 1fr}}
.grid-gap-lg{gap:40px}
.grid-gap-sm{gap:20px}

/* ===== CARD ===== */
.card{background:var(--color-white);border-radius:var(--radius-md);padding:28px 24px;box-shadow:var(--shadow-card);border:1px solid var(--color-border);transition:transform .3s ease,box-shadow .3s ease;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.card-title{font-family:var(--font-heading);font-weight:700;font-size:1.15rem;color:var(--color-heading);margin-bottom:10px}
.card-text{font-family:var(--font-body);font-size:0.95rem;color:var(--color-text);line-height:1.7}
.card-cta{margin-top:16px;display:inline-flex;align-items:center;gap:6px;font-family:var(--font-accent);font-weight:600;font-size:0.9rem;color:var(--color-primary);transition:color .2s,gap .2s}
.card-cta:hover{color:var(--color-accent);gap:10px}
@media(prefers-reduced-motion:reduce){.card:hover{transform:none;box-shadow:var(--shadow-card)}}

/* ===== BUTTON VARIANTS ===== */
.btn{display:inline-flex;align-items:center;padding:12px 28px;font-family:var(--font-accent);font-weight:600;font-size:0.95rem;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:background .2s,transform .2s,box-shadow .2s;text-decoration:none}
.btn-primary{background:var(--color-primary);color:var(--color-white)}
.btn-primary:hover{background:#236b5c;transform:translateY(-1px);box-shadow:0 4px 12px rgba(42,127,110,0.3);color:var(--color-white)}
.btn-outline{background:transparent;color:var(--color-primary);border:1.5px solid var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:var(--color-white)}
.btn-accent{background:var(--color-accent);color:var(--color-white)}
.btn-accent:hover{background:#d4923f;transform:translateY(-1px);box-shadow:0 4px 12px rgba(232,163,75,0.35);color:var(--color-white)}
.btn-sm{padding:8px 18px;font-size:0.85rem}
.btn-lg{padding:14px 36px;font-size:1.05rem}

/* ===== UTILITY ===== */
.text-center{text-align:center}
.text-accent{color:var(--color-accent)}
.text-primary{color:var(--color-primary)}
.text-muted{color:#718096}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mt-48{margin-top:48px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-32{margin-bottom:32px}
.mb-48{margin-bottom:48px}
.py-16{padding-top:16px;padding-bottom:16px}
.py-32{padding-top:32px;padding-bottom:32px}

/* ===== DIVIDER ===== */
.divider{width:100%;height:1px;background:var(--color-border);border:none;margin:0}

/* ===== BREADCRUMB ===== */
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-family:var(--font-accent);font-size:0.85rem;color:#718096;margin-bottom:24px;padding:12px 0}
.breadcrumb a{color:var(--color-primary);transition:color .2s}
.breadcrumb a:hover{color:var(--color-accent)}
.breadcrumb span{color:var(--color-text)}
.breadcrumb-sep{color:var(--color-border);font-size:0.75rem;margin:0 4px}

/* ===== IMAGE CONTAINER (placeholder) ===== */
.img-container{position:relative;overflow:hidden;border-radius:var(--radius-md);background:var(--color-primary-transparent);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;color:var(--color-primary);font-family:var(--font-accent);font-size:0.85rem;border:1px dashed var(--color-border)}
.img-container img{width:100%;height:100%;object-fit:cover}
.img-container-round{aspect-ratio:1/1;border-radius:50%}
.img-container-wide{aspect-ratio:21/9}

/* ===== TAG / BADGE ===== */
.tag{display:inline-flex;align-items:center;padding:4px 14px;font-family:var(--font-accent);font-weight:600;font-size:0.78rem;border-radius:20px;background:var(--color-primary-transparent);color:var(--color-primary);letter-spacing:0.3px}
.tag-accent{background:rgba(232,163,75,0.15);color:#b87d30}

/* ===== RESPONSIVE HELPERS ===== */
@media(max-width:639px){.hide-mobile{display:none!important}}
@media(min-width:640px)and(max-width:959px){.hide-tablet{display:none!important}}
@media(min-width:960px){.hide-desktop{display:none!important}}

/* ===== ACCORDION (for FAQ pages) ===== */
.accordion-item{border-bottom:1px solid var(--color-border)}
.accordion-trigger{display:flex;justify-content:space-between;align-items:center;width:100%;padding:16px 0;font-family:var(--font-accent);font-weight:600;font-size:1rem;color:var(--color-heading);background:none;border:none;cursor:pointer;text-align:left;transition:color .2s}
.accordion-trigger:hover{color:var(--color-primary)}
.accordion-trigger::after{content:'';display:inline-block;width:10px;height:10px;border-right:2px solid var(--color-primary);border-bottom:2px solid var(--color-primary);transform:rotate(45deg);transition:transform .3s ease;flex-shrink:0;margin-left:12px}
.accordion-trigger[aria-expanded="true"]::after{transform:rotate(225deg)}
.accordion-panel{padding:0 0 16px;font-family:var(--font-body);font-size:0.95rem;color:var(--color-text);line-height:1.8;display:none}
.accordion-panel[data-open]{display:block}
@media(prefers-reduced-motion:reduce){.accordion-trigger::after{transition:none}}

/* ===== PROGRESS STEP (自助修复) ===== */
.progress-step{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-left:2px solid var(--color-border);padding-left:20px;position:relative}
.progress-step::before{content:'';position:absolute;left:-6px;top:20px;width:10px;height:10px;border-radius:50%;background:var(--color-border);border:2px solid var(--color-bg)}
.progress-step.active::before{background:var(--color-primary);border-color:var(--color-accent)}
.progress-step.done::before{background:var(--color-accent);border-color:var(--color-accent)}
.progress-step-label{font-family:var(--font-accent);font-weight:600;font-size:0.9rem;color:var(--color-heading);margin-bottom:4px}
.progress-step-desc{font-family:var(--font-body);font-size:0.88rem;color:var(--color-text);line-height:1.6}

/* ===== RESPONSIVE TYPOGRAPHY ===== */
@media(max-width:639px){
  h1{font-size:1.8rem}
  h2{font-size:1.4rem}
  h3{font-size:1.15rem}
  body{font-size:0.95rem}
  .section{padding:48px 0}
}
@media(min-width:640px)and(max-width:959px){
  h1{font-size:2.2rem}
  h2{font-size:1.7rem}
  .section{padding:64px 0}
}

/* ===== FOCUS VISIBLE GLOBAL ===== */
:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px;border-radius:2px}
button:focus-visible,.btn:focus-visible,a:focus-visible{border-radius:var(--radius-sm)}

/* ===== PRINT ===== */
@media print{
  .site-header,.site-footer,.scroll-bar,.nav-toggle{display:none!important}
  body{background:#fff;color:#000}
  .container{padding:0;max-width:100%}
}