/* ═══════════════ 基础与变量 ═══════════════ */
:root{
  --paper:#f3efe6;          /* 米白纸 */
  --paper-2:#ece5d6;        /* 深一档纸 */
  --ink:#23201a;            /* 墨黑 */
  --ink-soft:#5a5246;
  --ink-faint:#8a8072;
  --cinnabar:#b03a2e;       /* 朱砂 */
  --line:rgba(74,58,36,.18);
  --hairline:rgba(74,58,36,.10);
  --serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:"SF Mono",ui-monospace,"PingFang SC",monospace;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);color:var(--ink);font-family:var(--sans);
  line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.05'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}
.wrap{position:relative;z-index:1;}

/* ═════════════════ 版式工具 ═════════════════ */
.container{max-width:1120px;margin:0 auto;padding:0 28px;}
.section{padding:110px 0;position:relative;}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--cinnabar,#b03a2e);
  text-transform:uppercase;margin-bottom:18px;display:flex;align-items:center;gap:14px;
}
.eyebrow::before{content:"";width:34px;height:1px;background:#b03a2e;display:inline-block;}
.h2-serif{
  font-family:var(--serif);font-weight:700;font-size:clamp(30px,4.4vw,46px);
  letter-spacing:.02em;line-height:1.3;color:var(--ink);
}
.lede{font-size:16.5px;color:var(--ink-soft);max-width:600px;margin-top:18px;}

/* ═════════════════ NAV ═════════════════ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:blur(14px);
  background:linear-gradient(to bottom,rgba(243,239,230,.92),rgba(243,239,230,.72));
  border-bottom:1px solid var(--hairline);transition:box-shadow .3s;
}
.nav.scrolled{box-shadow:0 6px 30px rgba(74,58,36,.08);}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 28px;height:66px;display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);}
.brand-logo{width:34px;height:34px;border-radius:7px;object-fit:contain;display:block;flex-shrink:0;}
.brand-name{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.06em;}
.brand-name small{font-size:11px;color:var(--ink-faint);letter-spacing:.28em;margin-left:8px;font-family:var(--mono);}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none;}
.nav-links a{color:var(--ink-soft);text-decoration:none;font-size:14px;transition:color .2s;}
.nav-links a:hover{color:var(--cinnabar,#b03a2e);}
.nav-cta{
  background:var(--ink);color:var(--paper);padding:9px 20px;border-radius:5px;
  font-size:14px;text-decoration:none;transition:background .25s,transform .25s;
  box-shadow:0 3px 12px rgba(26,25,22,.28);
}
.nav-cta:hover{background:var(--cinnabar,#b03a2e);transform:translateY(-1px);}
@media(max-width:760px){.nav-links{display:none;}}

/* ═════════════════ HERO ═════════════════ */
.hero{min-height:100svh;display:flex;align-items:center;padding-top:66px;position:relative;overflow:hidden;}
/* ── 墨韵背景层 ── */
.ink-scene{position:absolute;inset:0;z-index:0;pointer-events:none;will-change:transform;}
.par{will-change:transform;}
.par.abs{position:absolute;}
.par1{left:-180px;top:-160px;width:560px;height:560px;}
.par2{right:-140px;top:12%;width:460px;height:460px;}
.par3{left:36%;bottom:-180px;width:400px;height:400px;}
.par4{right:-130px;bottom:-190px;width:540px;height:540px;}
.ink-blob{width:100%;height:100%;border-radius:50%;filter:blur(72px);animation:ink-drift 16s ease-in-out infinite;}
.b1{background:radial-gradient(circle,rgba(176,58,46,.16),transparent 65%);}
.b2{background:radial-gradient(circle,rgba(74,58,36,.13),transparent 65%);animation-duration:21s;animation-direction:reverse;}
.b3{background:radial-gradient(circle,rgba(176,58,46,.11),transparent 65%);animation-duration:26s;}
@keyframes ink-drift{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(44px,-32px) scale(1.09);}}
.ink-ring{width:100%;height:100%;border-radius:50%;border:1.5px dashed rgba(176,58,46,.22);animation:ring-spin 70s linear infinite;}
.ink-ring::after{content:"";position:absolute;inset:14%;border-radius:50%;border:1px solid rgba(176,58,46,.13);}
.ink-ring::before{content:"";position:absolute;inset:34%;border-radius:50%;border:1px dashed rgba(176,58,46,.10);}
@keyframes ring-spin{to{transform:rotate(360deg);}}
/* ── 升腾墨点 ── */
.ink-dust{position:absolute;inset:0;overflow:hidden;}
.dust{
  position:absolute;bottom:-24px;border-radius:50%;
  background:radial-gradient(circle,rgba(35,32,26,.34),rgba(35,32,26,0) 70%);
  opacity:0;animation:dust-rise linear infinite;
}
.pd1{left:12%;width:10px;height:10px;animation-duration:16s;}
.pd2{left:28%;width:6px;height:6px;animation-duration:20s;animation-delay:2s;}
.pd3{left:55%;width:14px;height:14px;animation-duration:24s;animation-delay:5s;}
.pd4{left:72%;width:8px;height:8px;animation-duration:18s;animation-delay:8s;}
.pd5{left:88%;width:12px;height:12px;animation-duration:26s;animation-delay:4s;}
.pd6{left:64%;width:5px;height:5px;animation-duration:22s;animation-delay:11s;}
@keyframes dust-rise{
  0%{transform:translate(0,0) scale(.6);opacity:0;}
  15%{opacity:.5;}
  80%{opacity:.24;}
  100%{transform:translate(34px,-110vh) scale(1.2);opacity:0;}
}
/* ── 漂浮书法虚字 ── */
.ink-char{
  position:absolute;font-family:var(--serif);font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(176,58,46,.12);
  opacity:0;animation:char-float linear infinite;user-select:none;
}
.c1{left:7%;top:14%;font-size:clamp(90px,12vw,150px);animation-duration:13s;animation-delay:1s;}
.c2{right:12%;top:54%;font-size:clamp(70px,9vw,120px);animation-duration:16s;animation-delay:3s;}
.c3{left:42%;bottom:8%;font-size:clamp(60px,8vw,100px);animation-duration:19s;animation-delay:5s;}
@keyframes char-float{
  0%{transform:translateY(46px) rotate(-7deg);opacity:0;}
  20%{opacity:.5;}
  78%{opacity:.3;}
  100%{transform:translateY(-130px) rotate(5deg);opacity:0;}
}
/* ── 斜向光线扫过 ── */
.ink-sheen{
  position:absolute;top:-15%;bottom:-15%;width:30%;left:-45%;
  background:linear-gradient(105deg,rgba(255,250,240,0),rgba(255,250,240,.16) 50%,rgba(255,250,240,0));
  transform:rotate(12deg);opacity:0;animation:sheen 8s ease-in-out infinite;pointer-events:none;
}
@keyframes sheen{
  0%,58%{transform:translateX(0) rotate(12deg);opacity:0;}
  64%{opacity:1;}
  78%,100%{transform:translateX(1560%) rotate(12deg);opacity:0;}
}
@media(max-width:760px){
  .par1{left:-140px;top:-120px;width:340px;height:340px;}
  .par2{right:-100px;top:16%;width:300px;height:300px;}
  .par3{left:20%;bottom:-140px;width:300px;height:300px;}
  .par4{display:none;}
  .ink-blob{filter:blur(52px);}
}
.hero-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center;will-change:transform;}
.hero-kicker{font-family:var(--serif);color:#b03a2e;letter-spacing:.3em;font-size:13px;display:flex;align-items:center;gap:12px;margin-bottom:26px;}
.hero-kicker::after{content:"";width:64px;height:1px;background:var(--line);}
.hero h1{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(24px,3.4vw,44px);line-height:1.42;letter-spacing:.02em;
}
/* ── 大标题排版 ── */
.hero-h-wrap{position:relative;}
.hero-h-wrap h1{position:relative;z-index:1;}
.h-mark{
  position:absolute;right:-26px;top:-64px;font-family:var(--serif);font-weight:900;
  font-size:clamp(140px,20vw,230px);line-height:1;color:transparent;
  -webkit-text-stroke:1.4px rgba(176,58,46,.20);
  user-select:none;pointer-events:none;z-index:0;
}
.h-line{display:block;white-space:nowrap;}
.h-line .hl{color:#b03a2e;}
.h-line .h-dot{color:#b03a2e;font-size:.62em;vertical-align:.18em;padding:0 .28em;font-family:var(--mono);}
.h-line.h-sub{margin-top:.34em;font-size:.62em;color:var(--ink-soft);letter-spacing:.08em;line-height:1.5;}
/* 逐字书写动效 */
.h-char{display:inline-block;opacity:1;will-change:transform,filter;}
html.js .h-char{
  opacity:0;transform:translateY(.4em) rotate(4deg);filter:blur(6px);
  animation:h-char-in .5s cubic-bezier(.2,.7,.3,1) forwards;
}
@keyframes h-char-in{to{opacity:1;transform:none;filter:blur(0);}}
/* 写作光标 */
.h-caret{
  display:inline-block;width:2px;height:.92em;margin-left:6px;vertical-align:-.12em;
  background:#b03a2e;opacity:0;
}
html.js .h-caret{animation:h-caret-blink 1.1s steps(1) infinite;}
@keyframes h-caret-blink{50%{opacity:0;}}
/* 笔触下划线 */
.brush{position:relative;display:inline-block;}
.brush svg{position:absolute;left:2%;bottom:-10px;width:96%;height:16px;overflow:visible;}
.brush svg path{fill:none;stroke:url(#brushGrad);stroke-width:6;stroke-linecap:round;}
html.js .brush svg path{
  stroke-dasharray:300;stroke-dashoffset:300;
  animation:brush-draw .65s 1.05s cubic-bezier(.45,.1,.25,1) forwards;
}
@keyframes brush-draw{to{stroke-dashoffset:0;}}
/* 印章落款 */
.stamp{
  display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:62px;margin-left:14px;border-radius:4px;
  background:linear-gradient(145deg,#c24a3c,#96291f);
  color:#fff5ea;font-family:var(--serif);font-weight:800;font-size:15px;letter-spacing:6px;
  writing-mode:vertical-rl;text-orientation:upright;
  box-shadow:0 10px 26px rgba(176,58,46,.42),inset 0 0 0 1.5px rgba(255,245,234,.32);
  transform:rotate(6deg);transform-origin:center;
}
html.js .stamp{
  opacity:0;transform:rotate(6deg) scale(.5);
  animation:stamp-in .5s 1.15s cubic-bezier(.2,1.35,.3,1) forwards;
}
@keyframes stamp-in{to{opacity:1;transform:rotate(6deg) scale(1);}}
@media(max-width:760px){
  .hero-h-wrap h1{font-size:clamp(20px,6vw,28px);}
  .h-line{white-space:normal;}
  .hero h1{font-family:var(--serif);font-weight:800;font-size:clamp(20px,6vw,28px);line-height:1.45;letter-spacing:.02em;}
  .h-mark{right:-10px;top:-40px;font-size:120px;}
  .stamp{width:44px;height:50px;font-size:13px;letter-spacing:4px;margin-left:10px;}
  .brush svg{bottom:-8px;}
}
.hero-lede{
  margin-top:30px;max-width:560px;font-size:17.5px;line-height:1.9;color:var(--ink-soft);
  border-left:3px solid rgba(176,58,46,.4);padding-left:18px;
}
.hero-lede b{
  font-family:var(--serif);font-weight:800;font-size:20px;color:#b03a2e;letter-spacing:.05em;
}
.hero-lede .lede-dash{color:var(--ink-faint);font-family:var(--mono);font-size:13px;padding:0 4px;}
.hero-tags{margin-top:40px;display:flex;gap:26px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;color:var(--ink-faint);letter-spacing:.06em;}
.hero-tags span{display:flex;align-items:center;gap:7px;}
.hero-tags i{color:#b03a2e;font-style:normal;}
.cta-row{margin-top:34px;display:flex;gap:16px;flex-wrap:wrap;align-items:center;}
.btn{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;
  padding:15px 30px;border-radius:6px;font-size:15px;font-weight:600;
  transition:transform .22s,box-shadow .22s,background .22s;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:#b03a2e;color:#fff5ea;box-shadow:0 8px 26px rgba(176,58,46,.36);}
.btn-primary:hover{box-shadow:0 12px 34px rgba(176,58,46,.45);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line);}
.btn-ghost:hover{border-color:#b03a2e;color:#b03a2e;}
.btn small{display:block;font-weight:400;font-size:11px;opacity:.78;margin-top:1px;}

/* 右侧写作台示意图 */
.stage{position:relative;}
.writer{
  position:relative;background:#fffaf0;border:1px solid var(--line);border-radius:12px;
  box-shadow:0 30px 80px rgba(60,45,20,.18),0 4px 16px rgba(60,45,20,.06);overflow:hidden;
}
@media(max-width:900px){.writer{transform:none;}}
.winbar{background:#efe8d8;border-bottom:1px solid var(--line);padding:12px 16px;display:flex;align-items:center;gap:9px;}
.winbar-title{font-family:var(--mono);font-size:11px;color:var(--stone,#8a8072);letter-spacing:.12em;margin-left:8px;}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block;}
.dot-c{background:#e2705f;} .dot-y{background:#e4b84b;} .dot-g{background:#68b25b;}
.writer-body{display:grid;grid-template-columns:120px 1fr 120px;min-height:330px;font-size:12.5px;}
.w-col{position:relative;overflow:hidden;padding:16px 12px;}
.w-side{background:#f6efdd;}
.w-col.w-side:first-child{border-right:1px solid var(--hairline);}
.w-main{background:#fffaf0;border-right:1px solid var(--hairline);padding:16px 18px;}
.w-raise{display:flex;flex-direction:column;}
.w-section{font-family:var(--serif);font-size:11.5px;color:var(--ink-soft);margin-bottom:10px;letter-spacing:.06em;display:flex;justify-content:space-between;}
.w-section span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.w-item{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ink-soft);padding:4px 0;line-height:1.4;}
.w-item i{font-style:normal;color:#b03a2e;font-size:9px;}
.w-item:nth-child(2){color:var(--ink);font-weight:700;}
.w-field{margin-bottom:12px;}
.w-field label{display:block;font-size:10.5px;color:var(--ink-faint);margin-bottom:5px;letter-spacing:.04em;}
.w-input{display:block;height:9px;background:rgba(70,55,35,.16);border-radius:3px;}
.w-adv{margin-top:16px;padding-top:12px;border-top:1px dashed rgba(176,58,46,.35);display:flex;flex-direction:column;gap:7px;}
.w-adv-badge{display:inline-flex;align-self:flex-start;font-size:9px;letter-spacing:.18em;color:#fff;background:linear-gradient(135deg,#b03a2e,#d0604f);padding:2px 8px;border-radius:3px;font-family:var(--mono);margin-bottom:2px;}
.w-adv-item{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ink);font-weight:700;line-height:1.4;}
.w-adv-item i{font-style:normal;color:#b03a2e;font-size:11px;}
.w-card{margin-top:auto;background:#fffaf0;border:1px solid var(--line);border-radius:8px;padding:10px;}
.w-card-title{font-size:10.5px;color:var(--ink);font-weight:700;margin-bottom:7px;}
.w-card-bar{height:6px;background:rgba(70,55,35,.14);border-radius:3px;overflow:hidden;}
.w-card-bar i{display:block;height:100%;background:linear-gradient(90deg,#b03a2e,#d0604f);border-radius:3px;}
.w-card-note{font-size:9.5px;color:var(--ink-faint);margin-top:7px;}
.writer-status{display:flex;justify-content:space-between;align-items:center;background:#f1eada;border-top:1px solid var(--hairline);padding:8px 14px;font-family:var(--mono);font-size:10px;color:var(--ink-faint);letter-spacing:.05em;}
.writer-status span:first-child{color:#5a8f4c;}
.cols{display:grid;grid-template-columns:118px 1fr 96px;min-height:300px;font-size:12.5px;}
.col{position:relative;overflow:hidden;}
.col-left{background:#f6efdd;border-right:1px solid var(--hairline);padding:16px 12px;}
.col-mid{background:#fffaf0;border-right:1px solid var(--hairline);padding:16px 18px;}
.col-right{background:#f6efdd;padding:16px 10px;}
.mk{font-family:var(--serif);font-size:11.5px;color:var(--ink-soft);margin-bottom:8px;letter-spacing:.06em;display:flex;justify-content:space-between;}
.mk i{font-style:normal;color:#b03a2e;font-size:10px;}
.mk-item{border-left:2px solid var(--line);padding:2px 0 2px 8px;margin-bottom:9px;color:var(--ink-soft);font-size:11.5px;line-height:1.5;}
.mk-item.sel{border-left-color:#b03a2e;color:var(--ink);background:rgba(176,58,46,.06);}
.para{height:7px;background:rgba(70,55,35,.16);border-radius:3px;margin-bottom:9px;}
.w70{width:70%;} .w90{width:90%;} .w55{width:55%;} .w80{width:80%;} .w40{width:40%;} .w85{width:85%;} .w95{width:95%;}
.hi{background:rgba(176,58,46,.5) !important;}
.caret{display:inline-block;width:2px;height:13px;background:#b03a2e;vertical-align:middle;animation:blink 1s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}
/* 数据浮卡（已移除） */
@keyframes stat-float{0%,100%{transform:translateY(0) rotate(-2deg);}50%{transform:translateY(-9px) rotate(2deg);}}
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;}.stage{max-width:520px;margin:0 auto;}
}

/* ═════════════════ 数据条 ═════════════════ */
.strip{border-bottom:1px solid var(--hairline);background:rgba(236,229,214,.5);}
.strip-inner{display:grid;grid-template-columns:repeat(4,1fr);}
.strip-item{padding:26px 22px;border-right:1px solid var(--hairline);text-align:center;}
.strip-item:last-child{border-right:none;}
.strip-num{font-family:var(--serif);font-size:26px;font-weight:800;color:#b03a2e;}
.strip-lab{font-size:12.5px;color:var(--ink-soft);margin-top:4px;letter-spacing:.08em;}
@media(max-width:760px){.strip-inner{grid-template-columns:repeat(2,1fr);}.strip-item:nth-child(2){border-right:none;}}

/* ═════════════════ 工作流 ═════════════════ */
.flow{background:var(--paper-2);}
.flow-line{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;margin-top:52px;position:relative;}
.flow-node{position:relative;padding-top:6px;}
.flow-node::before{
  content:attr(data-no);position:absolute;top:-38px;left:0;
  font-family:var(--serif);font-weight:800;font-size:50px;color:transparent;
  -webkit-text-stroke:1px #b03a2e;opacity:.45;
}
.flow-node h3{font-family:var(--serif);font-size:18px;margin-bottom:8px;}
.flow-node p{font-size:12.5px;color:var(--ink-soft);line-height:1.6;}
.flow-node::after{content:"";position:absolute;left:0;right:0;top:-16px;height:1px;background:var(--line);}
@media(max-width:900px){
  .flow-line{grid-template-columns:repeat(2,1fr);row-gap:44px;}
  .flow-node:nth-child(odd)::after{width:100%;}
}

/* ═════════════════ 功能区块 ═════════════════ */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding:74px 0;}
.f-text h3{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3vw,34px);line-height:1.35;margin-bottom:16px;}
.f-text p{color:var(--ink-soft);font-size:15.5px;max-width:480px;}
.f-list{margin-top:22px;list-style:none;}
.f-list li{display:flex;gap:12px;align-items:flex-start;padding:9px 0;font-size:14.5px;color:var(--ink);border-bottom:1px dashed var(--hairline);}
.f-list li::before{content:"❦";color:#b03a2e;font-size:15px;flex:none;margin-top:1px;}
.f-visual{position:relative;}
@media(max-width:900px){.feature{grid-template-columns:1fr;gap:40px;}}

/* 通用卡片 mock */
.card{background:#fffaf0;border:1px solid var(--line);}
.chip{
  display:inline-block;background:#fff;border:1px solid var(--hairline);border-radius:99px;
  padding:3px 10px;font-size:11px;color:var(--ink-soft);margin:0 5px 6px 0;
}
.chip.on{border-color:#b03a2e;color:#b03a2e;}
.mini{background:#fff;border:1px solid var(--hairline);border-radius:6px;padding:10px;}
.mini b{font-family:var(--serif);font-size:13px;font-weight:700;display:block;}
.mini span{font-size:11px;color:var(--ink-faint);}
.tag{display:inline-block;background:rgba(176,58,46,.1);color:#b03a2e;font-size:11px;padding:2px 8px;border-radius:3px;margin-right:6px;}

/* ═════════════════ 方法论三支柱 ═════════════════ */
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:54px;}
.method-card{background:#fffaf0;border:1px solid var(--line);border-radius:14px;padding:38px 30px 32px;position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s;}
.method-card:hover{transform:translateY(-6px);box-shadow:0 24px 60px rgba(60,45,20,.12);}
.method-no{
  position:absolute;top:-16px;right:8px;font-family:var(--serif);font-weight:800;font-size:92px;line-height:1;
  color:transparent;-webkit-text-stroke:1px #b03a2e;opacity:.16;pointer-events:none;
}
.method-tag{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.26em;color:#b03a2e;margin-bottom:16px;}
.method-card h3{font-family:var(--serif);font-size:24px;font-weight:800;margin-bottom:12px;}
.method-card>p{font-size:13.5px;color:var(--ink-soft);line-height:1.85;margin-bottom:20px;}
.method-chips{display:flex;flex-wrap:wrap;gap:7px;}
.method-chips span{font-size:12px;color:var(--ink);background:#fff;border:1px solid var(--hairline);border-radius:99px;padding:4px 12px;}
.method-chips span.on{border-color:#b03a2e;color:#b03a2e;background:rgba(176,58,46,.06);}
.method-link{display:inline-flex;align-items:center;gap:6px;margin-top:22px;font-size:13px;color:var(--ink);text-decoration:none;font-weight:600;transition:color .2s;letter-spacing:.04em;}
.method-link:hover{color:#b03a2e;}
@media(max-width:900px){.method-grid{grid-template-columns:1fr;max-width:480px;margin-left:auto;margin-right:auto;}}

/* ═════════════════ 模块矩阵 ═════════════════ */
.mod-group{margin-top:70px;}
.mod-group-head{display:flex;align-items:baseline;gap:14px;margin-bottom:24px;}
.mod-group-head h3{font-family:var(--serif);font-size:24px;font-weight:800;}
.mod-group-head span{font-size:11.5px;letter-spacing:.24em;color:var(--ink-faint);font-family:var(--mono);}
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.mod-card{
  background:#fffaf0;border:1px solid var(--hairline);border-radius:10px;padding:24px 22px 18px;
  transition:transform .25s,box-shadow .25s,border-color .25s;position:relative;overflow:hidden;
}
.mod-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(60,45,20,.10);border-color:var(--line);}
.mod-card::before{content:attr(data-ico);position:absolute;right:16px;top:12px;font-size:24px;opacity:.22;}
.mod-card h4{font-family:var(--serif);font-size:16.5px;font-weight:700;margin-bottom:8px;}
.mod-card p{font-size:12.8px;color:var(--ink-soft);line-height:1.75;}
.mod-card .mk-line{display:flex;flex-wrap:wrap;gap:5px;margin-top:13px;}
.mod-card .mk-line i{font-style:normal;font-size:11px;color:var(--ink-faint);border:1px dashed var(--hairline);border-radius:3px;padding:2px 7px;}
@media(max-width:900px){.mod-grid{grid-template-columns:1fr;max-width:480px;margin-left:auto;margin-right:auto;}}

/* ═════════════════ 亮点 ═════════════════ */
.hl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:52px;}
.hl-card{
  background:rgba(255,250,240,.62);border:1px solid var(--hairline);border-radius:12px;
  padding:28px 20px;text-align:center;transition:transform .3s,border-color .3s;position:relative;
}
.hl-card:hover{transform:translateY(-5px);border-color:#b03a2e;}
.hl-ico{width:46px;height:46px;border-radius:50%;background:#b03a2e;color:#fff5ea;display:grid;place-items:center;margin:0 auto 16px;font-size:19px;font-family:var(--serif);font-weight:800;}
.hl-card h4{font-family:var(--serif);font-size:16px;font-weight:700;margin-bottom:8px;}
.hl-card p{font-size:12.3px;color:var(--ink-soft);line-height:1.7;}
@media(max-width:900px){.hl-grid{grid-template-columns:repeat(2,1fr);}.hl-card:last-child{grid-column:1/-1;max-width:300px;margin:0 auto;}}


/* ═════════════════ 下载 / CTA ═════════════════ */
.download{background:var(--ink);color:var(--paper);}

.download h2{font-family:var(--serif);font-size:clamp(32px,4.6vw,52px);font-weight:800;text-align:center;color:var(--paper);}
.download .sub{text-align:center;color:rgba(235,228,212,.72);margin-top:16px;font-size:16px;max-width:640px;margin-left:auto;margin-right:auto;}
.plat-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:880px;margin:52px auto 0;}
.plat-card{
  background:rgba(255,255,255,.045);border:1px solid rgba(235,228,212,.16);border-radius:14px;
  padding:34px 34px 30px;text-align:left;transition:background .3s,transform .3s,border-color .3s;
}
.plat-card:hover{background:rgba(255,255,255,.08);transform:translateY(-4px);border-color:rgba(230,168,157,.5);}
.plat-os{font-family:var(--serif);font-size:21px;font-weight:800;display:flex;align-items:center;gap:12px;}
.plat-os svg{width:26px;height:26px;fill:var(--paper);}
.plat-meta{font-family:var(--mono);font-size:11.5px;color:rgba(235,228,212,.55);letter-spacing:.12em;margin-top:8px;}
.plat-dl{
  margin-top:22px;display:inline-block;background:var(--paper);color:var(--ink);font-weight:700;
  padding:12px 26px;border-radius:6px;text-decoration:none;font-size:14px;transition:background .25s,transform .25s;cursor:pointer;
}
.plat-dl:hover{background:#fff5ea;transform:translateY(-2px);}
.dl-hint{font-size:12px;color:rgba(235,228,212,.5);margin-top:14px;line-height:1.7;}
@media(max-width:900px){.plat-grid{grid-template-columns:1fr;}}

/* ═════════════════ FAQ ═════════════════ */
.faq-item{border-bottom:1px solid var(--hairline);padding:26px 4px;cursor:pointer;}
.faq-q{display:flex;justify-content:space-between;align-items:center;font-family:var(--serif);font-size:17px;font-weight:700;}
/* 对比表 */
.c-row{border-bottom:1px solid var(--hairline);}
.c-row:last-child{border-bottom:none;}
.c-row > div{padding:16px 10px;}
.c-row > div:first-child{color:var(--ink-soft);}
@media(max-width:760px){
  .c-row{grid-template-columns:1fr 1fr!important;}
  .c-row > div:nth-child(3),.c-row > div:nth-child(4){background:rgba(243,239,230,.45);}
  .c-row:first-child > div:nth-child(3),.c-row:first-child > div:nth-child(4){background:none;}
}
.faq-q i{font-style:normal;color:#b03a2e;transition:transform .3s;font-size:22px;}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,opacity .3s;opacity:0;color:var(--ink-soft);font-size:14.5px;}
.faq-item.open .faq-a{max-height:300px;opacity:1;margin-top:14px;}

/* ═════════════════ FOOTER ═════════════════ */
.footer{border-top:1px solid var(--hairline);padding:56px 0 40px;font-size:13px;color:var(--ink-soft);}
.footer-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.footer-brand{font-family:var(--serif);font-weight:800;font-size:18px;color:var(--ink);display:flex;align-items:center;gap:10px;}
.footer-logo{width:34px;height:34px;border-radius:7px;object-fit:contain;}
.footer-col b{display:block;font-size:13px;color:var(--ink);margin-bottom:10px;}
.footer-col a{display:block;color:var(--ink-soft);text-decoration:none;padding:5px 0;transition:color .2s;}
.footer-col a:hover{color:#b03a2e;}
.footer-qr-box{display:flex;flex-direction:column;align-items:center;gap:8px;}
.footer-qr{width:120px;height:120px;border-radius:8px;border:1px solid var(--hairline);background:#fff;object-fit:contain;padding:4px;box-shadow:0 2px 10px rgba(0,0,0,.06);}
.footer-qr-tip{font-size:12px;color:var(--ink-faint);letter-spacing:.06em;}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--hairline);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--ink-faint);font-size:12px;}

/* ═════════════════ 视图动画 ═════════════════ */
/* 动画全部门控在 html.js 下：
   无 JS / 禁动画 / prefers-reduced-motion 时内容默认可见，绝不出现空白。 */
.reveal{transition:opacity .8s ease,transform .8s cubic-bezier(.2,.65,.25,1);}
html.js .reveal{opacity:0;transform:translateY(28px);}
html.js .reveal.in{opacity:1;transform:none;}

.hero-enter{opacity:1;}
html.js .hero-enter{animation:up .9s cubic-bezier(.2,.65,.25,1) both;}
@keyframes up{from{opacity:0;}to{opacity:1;}}
.d1{animation-delay:.05s}.d2{animation-delay:.15s}.d3{animation-delay:.25s}.d4{animation-delay:.35s}

@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1!important;transform:none!important;}
  html.js .hero-enter{animation:none!important;opacity:1!important;transform:none!important;}
}

/* ═════════════════ 下载提示 ═════════════════ */
#dl-toast{
  position:fixed;left:50%;top:44%;transform:translate(-50%,-50%) scale(.94);
  z-index:9999;background:#23201a;color:#f3efe6;border-radius:14px;
  padding:26px 34px 24px;max-width:82vw;text-align:center;
  box-shadow:0 18px 60px rgba(0,0,0,.4),0 0 0 1px rgba(176,58,46,.35);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .35s,transform .35s,visibility .35s;
  font-family:var(--sans);border-top:3px solid #b03a2e;
}
#dl-toast.show{opacity:1;visibility:visible;transform:translate(-50%,-50%) scale(1);}
.dl-toast-arrow{display:block;width:44px;height:44px;margin:0 auto 10px;}
.dl-toast-arrow svg{width:100%;height:100%;stroke:#b03a2e;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;}
.dl-toast-title{display:block;font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:.04em;color:#f3efe6;}
.dl-toast-sub{display:block;margin-top:8px;font-size:13.5px;color:#c9c2b4;line-height:1.7;}
.dl-toast-sub b{color:#f3efe6;font-weight:700;border-bottom:2px solid #b03a2e;padding-bottom:1px;}

/* ═════════════════ 悬浮客服 ═════════════════ */
.cs-fab{
  position:fixed;right:26px;bottom:26px;z-index:9990;
  display:flex;align-items:center;gap:8px;
  background:#b03a2e;color:#f3efe6;
  padding:13px 24px;border-radius:40px;
  font-size:14.5px;letter-spacing:.05em;cursor:pointer;
  box-shadow:0 10px 30px rgba(122,31,23,.45),0 0 0 1px rgba(176,58,46,.35);
  transition:transform .25s,background .25s;
  user-select:none;
}
.cs-fab svg{width:20px;height:20px;flex-shrink:0;}
.cs-fab:hover{background:#9a2f24;transform:translateY(-3px);}
.cs-fab:active{transform:translateY(-1px);}
.cs-pop{
  position:fixed;right:26px;bottom:100px;transform:translateY(12px);z-index:9991;
  background:#fffdf7;border-radius:16px;
  padding:20px 22px 18px;text-align:center;
  box-shadow:0 20px 60px rgba(35,32,26,.28),0 0 0 1px var(--hairline);
  opacity:0;visibility:hidden;
  transition:opacity .3s,transform .3s,visibility .3s;
}
.cs-pop.show{opacity:1;visibility:visible;transform:translateY(0);}
.cs-pop-head{
  font-family:var(--serif);font-weight:700;font-size:15px;color:var(--ink);
  margin-bottom:14px;display:flex;align-items:center;justify-content:center;gap:14px;
}
.cs-close{
  border:none;background:transparent;color:var(--ink-faint);font-size:14px;
  cursor:pointer;padding:2px 6px;line-height:1;transition:color .2s;
}
.cs-close:hover{color:var(--cinnabar);}
.cs-pop-qr{
  width:150px;height:150px;border-radius:10px;background:#fff;
  border:1px solid var(--hairline);object-fit:contain;padding:5px;
}
.cs-cards{display:flex;gap:14px;justify-content:center;}
.cs-card{display:flex;flex-direction:column;align-items:center;gap:8px;}
.cs-card-name{font-family:var(--serif);font-weight:700;font-size:14px;color:var(--ink);}
.cs-card-tip{font-size:12px;color:var(--ink-soft);line-height:1.75;letter-spacing:.03em;}
.cs-pop-tip{margin-top:14px;font-size:12.5px;color:var(--ink-soft);line-height:1.7;letter-spacing:.04em;}
@media(max-width:760px){
  .cs-fab{right:16px;bottom:18px;padding:11px 20px;font-size:13.5px;white-space:nowrap;}
  .cs-pop{right:16px;bottom:90px;width:92vw;max-width:420px;}
  .cs-pop-qr{width:130px;height:130px;}
  .cs-cards{gap:10px;}
}