/* ============================================================
   推泽 AI 外贸助手 · 品牌视觉系统 v2（2026-09-08 整体升级）
   深色科技 + 金色渐变 · 简洁、清晰、有档次
   ============================================================ */
:root{
  --bg:#080b12;          /* 主背景 更深邃 */
  --bg-2:#0d1220;        /* 次级背景 */
  --bg-3:#121a2e;        /* 卡片背景 */
  --bg-4:#1a2440;        /* 悬浮/强调背景 */
  --line:rgba(255,255,255,.07);  /* 分割线 */
  --line-2:rgba(255,255,255,.14); /* 强调分割线 */
  --gold:#d4a017;        /* 主金 */
  --gold-2:#f0c33c;      /* 亮金 */
  --gold-3:#f7d97e;      /* 最亮金（hover） */
  --gold-grad:linear-gradient(135deg,#f7d97e,#e8b84b 45%,#c8902a);
  --gold-grad-2:linear-gradient(135deg,#f0c33c,#d4a017 60%,#a97b0a);
  --txt:#eaeef7;         /* 主文字 更亮 */
  --txt-2:#9aa7bd;       /* 次级文字 */
  --txt-3:#66738c;       /* 弱化文字 */
  --blue:#4f7cff;        /* 辅助蓝 */
  --green:#2ecc8f;       /* 成功绿 */
  --red:#ff6b6b;         /* 警示红 */
  --shadow:0 24px 60px rgba(0,0,0,.5);
  --shadow-sm:0 8px 24px rgba(0,0,0,.35);
  --shadow-gold:0 8px 28px rgba(212,160,23,.25);
  --card-grad:linear-gradient(180deg,var(--bg-3),var(--bg-2));
  --card-hover:linear-gradient(180deg,var(--bg-4),var(--bg-3));
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --font:"Inter","PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);
  background:var(--bg);color:var(--txt);line-height:1.75;overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}

/* ===== 背景：网格 + 顶部光晕 ===== */
.bg-grid{position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%,rgba(212,160,23,.08),transparent 60%),
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:100% 100%,52px 52px,52px 52px;
  mask-image:radial-gradient(ellipse 90% 75% at 50% 0%,#000 35%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 90% 75% at 50% 0%,#000 35%,transparent 80%);}

/* ===== 卡片 ===== */
.card{background:var(--card-grad);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;transition:all .35s cubic-bezier(.16,1,.3,1);position:relative;overflow:hidden;}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:2.5px;background:var(--gold-grad);transform:scaleX(0);transform-origin:left;transition:transform .45s cubic-bezier(.16,1,.3,1);}
.card:hover{transform:translateY(-6px);border-color:rgba(212,160,23,.4);box-shadow:var(--shadow);background:var(--card-hover);}
.card:hover::before{transform:scaleX(1);}

/* ===== 区块标题：左对齐 + 编号，更有设计感 ===== */
.section{padding:84px 0;position:relative;}
.section-head{margin-bottom:44px;}
.section-eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--gold-2);font-size:12.5px;letter-spacing:3px;font-weight:700;text-transform:uppercase;margin-bottom:14px;}
.section-eyebrow::before{content:'';width:26px;height:2px;background:var(--gold-grad);border-radius:2px;}
.section-title{font-size:32px;font-weight:800;letter-spacing:-.5px;line-height:1.3;margin-bottom:10px;}
.section-sub{color:var(--txt-2);font-size:15.5px;max-width:640px;line-height:1.8;}
.section-center{text-align:center;}
.section-center .section-eyebrow::before{display:none;}
.section-center .section-sub{margin:0 auto;}
.divider{width:60px;height:3px;background:var(--gold-grad);border-radius:2px;margin:20px auto 0;}

/* ===== 导航：细边框 + 悬浮渐变 ===== */
.nav{position:sticky;top:0;z-index:100;background:rgba(8,11,18,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px;max-width:1180px;margin:0 auto;padding:0 24px;flex-wrap:wrap;}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:.5px;}
.nav-logo .logo-mark{width:32px;height:32px;border-radius:9px;background:var(--gold-grad);display:flex;align-items:center;justify-content:center;font-size:17px;color:#14171f;font-weight:900;box-shadow:0 2px 12px rgba(212,160,23,.45);}
.nav-logo b{color:#fff;}
.nav-logo span{background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.nav-links{display:flex;gap:4px;flex-wrap:wrap;}
.nav-links a{padding:8px 13px;border-radius:8px;color:var(--txt-2);font-size:14px;transition:all .22s;font-weight:500;}
.nav-links a:hover,.nav-links a.active{color:var(--gold-2);background:rgba(212,160,23,.08);}
.nav-cta{font-weight:700;color:var(--gold-2);font-size:13.5px;padding:8px 16px;border:1px solid rgba(212,160,23,.4);border-radius:8px;transition:all .22s;background:rgba(212,160,23,.05);}
.nav-cta:hover{background:rgba(212,160,23,.14);border-color:rgba(212,160,23,.6);}
.nav-user{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:700;font-size:14.5px;transition:all .28s;cursor:pointer;border:none;text-align:center;letter-spacing:.2px;}
.btn-gold{background:var(--gold-grad);color:#15180f;box-shadow:var(--shadow-gold);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(212,160,23,.45);filter:brightness(1.05);}
.btn-ghost{background:transparent;border:1px solid var(--line-2);color:var(--txt);}
.btn-ghost:hover{border-color:var(--gold-2);color:var(--gold-2);transform:translateY(-2px);background:rgba(212,160,23,.04);}
.btn-lg{padding:15px 36px;font-size:15.5px;border-radius:12px;}
.btn-sm{padding:8px 16px;font-size:13px;border-radius:8px;}

/* ===== 表单 ===== */
.input,.textarea,select.input{width:100%;background:var(--bg-2);border:1.5px solid #232e4a;color:var(--txt);border-radius:var(--radius-sm);padding:12px 14px;font-size:14.5px;font-family:inherit;transition:all .2s;}
.input:focus,.textarea:focus,select.input:focus{border-color:var(--gold);outline:none;box-shadow:0 0 0 3px rgba(212,160,23,.12);}
.textarea{resize:vertical;min-height:110px;}
label.fld{display:block;color:var(--txt-2);font-size:13px;font-weight:600;margin:14px 0 6px;}
.result{margin-top:20px;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:20px;white-space:pre-wrap;color:var(--txt);font-size:14px;line-height:1.85;display:none;}
.result.show{display:block;animation:fadeUp .45s both;}
.result h3{color:var(--gold-2);font-size:15px;margin-bottom:10px;}
.src{font-size:13px;color:var(--txt-3);margin-bottom:8px;}
.hint{font-size:12px;color:var(--txt-3);margin-top:6px;}
.err{color:#ff8a8a;background:rgba(255,80,80,.08);border:1px solid rgba(255,90,90,.35);border-radius:8px;padding:10px 14px;font-size:14px;display:none;margin-top:12px;}
.err.show{display:block;animation:fadeUp .3s both;}

/* ===== 页脚：精简居中（品牌 + 客服/链接 + 版权） ===== */
.footer{padding:50px 0 36px;border-top:1px solid var(--line);background:var(--bg-2);}
.footer-inner{max-width:1180px;margin:0 auto;padding:0 24px;text-align:center;color:var(--txt-3);font-size:13px;line-height:2;display:flex;flex-direction:column;gap:22px;}
.footer a{color:var(--txt-2);}
.foot-brand{font-size:15px;color:var(--gold-2);font-weight:700;line-height:1.7}
.foot-mid{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px 22px;line-height:2}
.foot-tel{display:inline-block;padding:7px 18px;border:1px solid rgba(212,160,23,.45);border-radius:30px;color:var(--gold-2)!important;font-weight:700;font-size:14px;text-decoration:none;transition:all .3s;background:rgba(212,160,23,.06);white-space:nowrap}
.foot-tel:hover{background:rgba(212,160,23,.16);box-shadow:0 0 20px rgba(212,160,23,.2)}
.foot-links{display:inline-flex;flex-wrap:wrap;gap:8px 18px;justify-content:center}
.foot-links a{color:var(--txt-2);text-decoration:none;font-size:13px;transition:color .25s}
.foot-links a:hover{color:var(--gold-2)}
.foot-copy{margin-top:4px;color:var(--txt-3);font-size:12px;line-height:2}
.foot-flink{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px 14px;color:var(--txt-3);font-size:12px;border-top:1px solid var(--line);padding-top:14px;margin-top:2px}
.foot-flink .fl-label{color:var(--txt-3)}
.foot-flink a{color:var(--txt-2);text-decoration:none;transition:color .25s}
.foot-flink a:hover{color:var(--gold-2)}
@media(max-width:640px){.foot-mid{flex-direction:column;gap:8px}}
/* ===== 动画 ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.h-anim{animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .05s both;}
.h-anim2{animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .18s both;}
.h-anim3{animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .32s both;}
.reveal{opacity:0;transform:translateY(36px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1);}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}

/* ===== 通用面板 ===== */
.panel{background:var(--card-grad);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;margin-top:24px;}
.panel h2{font-size:20px;margin-bottom:8px;}
.panel .sub{color:var(--txt-2);font-size:14px;margin-bottom:20px;}

/* ===== 徽章 / 标签 ===== */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;border:1px solid var(--line-2);color:var(--txt-2);}
.badge-gold{background:rgba(212,160,23,.1);border-color:rgba(212,160,23,.3);color:var(--gold-2);}
.badge-green{background:rgba(46,204,143,.1);border-color:rgba(46,204,143,.3);color:var(--green);}

/* ===== 工具 Grid ===== */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}}

/* ===== 导航注册按钮 ===== */
.nav-reg{background:var(--gold-grad);color:#15180f!important;font-weight:800;border-color:transparent!important;box-shadow:0 2px 10px rgba(212,160,23,.3);}
.nav-reg:hover{background:var(--gold-grad);color:#15180f!important;filter:brightness(1.08);transform:translateY(-1px);}