:root {
      --primary: #00eaff;
      --navy: #061426;
      --navy-2: #0b2940;
      --blue: #2563eb;
      --purple: #8b5cf6;
      --text: #334e68;
      --muted: #64788b;
      --page-bg: #f1f5f7;
      --header-height: 88px;
    }

    *, *::before, *::after { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 105px;
    }

    body {
      margin: 0;
      font-family: "Estedad", Tahoma, sans-serif;
      color: var(--text);
      background: #f8fafc;
      overflow-x: hidden;
    }

    a { color: inherit; }
    button, input, textarea, select { font: inherit; }
    img { max-width: 100%; }

    .container {
      width: min(100% - 40px, 1180px);
      margin-inline: auto;
    }

    /* ========================= هدر ========================= */

    .header {
      position: fixed;
      inset: 0 0 auto;
      z-index: 10000;
      min-height: var(--header-height);
      background: rgba(5, 15, 32, 0.97);
      border-bottom: 1px solid rgba(0, 234, 255, 0.2);
      box-shadow: 0 10px 35px rgba(0, 0, 0, 0.24);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      transition: background .25s ease, box-shadow .25s ease;
    }

    .header.scrolled {
      background: rgba(4, 11, 25, 0.995);
      box-shadow: 0 14px 38px rgba(0, 0, 0, 0.38);
    }

    .nav-wrapper {
      width: min(100% - 40px, 1400px);
      height: var(--header-height);
      margin-inline: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 13px;
      flex: 0 0 auto;
      min-width: max-content;
    }

    .brand-box > a {
      width: 60px;
      height: 60px;
      display: grid;
      place-items: center;
    }

    .brand-box img {
      width: 60px;
      height: 60px;
      display: block;
      object-fit: contain;
      border-radius: 14px;
      filter: drop-shadow(0 0 13px rgba(0, 234, 255, .42));
    }

    .brand-box .title {
      margin: 0;
      color: #fff;
      font-size: 1.25rem;
      font-weight: 800;
      line-height: 1.45;
      white-space: nowrap;
    }

    .brand-box small {
      display: block;
      color: #79dcff;
      font-size: .69rem;
      font-weight: 500;
      white-space: nowrap;
    }

    .menu {
      height: var(--header-height);
      margin: 0;
      padding: 0;
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: clamp(18px, 2vw, 30px);
      list-style: none;
    }

    .menu-item {
      position: relative;
      height: 100%;
      display: flex;
      align-items: center;
    }

    .menu-item > a {
      position: relative;
      height: 100%;
      display: flex;
      align-items: center;
      color: #e9f6ff;
      font-size: .94rem;
      font-weight: 600;
      text-decoration: none;
      white-space: nowrap;
      transition: color .22s ease;
    }

    .menu-item > a::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: 18px;
      left: 0;
      width: 0;
      height: 3px;
      margin: auto;
      background: var(--primary);
      border-radius: 20px;
      box-shadow: 0 0 12px rgba(0, 234, 255, .8);
      transition: width .22s ease;
    }

    .menu-item:hover > a,
    .menu-item.active > a { color: var(--primary); }

    .menu-item:hover > a::after,
    .menu-item.active > a::after { width: 100%; }

    .submenu {
      position: absolute;
      top: calc(100% - 7px);
      right: -17px;
      width: max-content;
      min-width: 230px;
      padding: 10px;
      background: rgba(6, 17, 36, .995);
      border: 1px solid rgba(0, 234, 255, .23);
      border-radius: 14px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, .48);
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      transform: translateY(9px);
      transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
    }

    .menu-item:hover > .submenu,
    .menu-item:focus-within > .submenu {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
      transform: translateY(0);
    }

    .submenu a {
      min-height: 42px;
      padding: 9px 13px;
      display: flex;
      align-items: center;
      color: #d9ecf8;
      font-size: .87rem;
      font-weight: 500;
      line-height: 1.7;
      text-decoration: none;
      white-space: nowrap;
      border-radius: 8px;
      transition: color .2s ease, background .2s ease, padding-right .2s ease;
    }

    .submenu a:hover,
    .submenu a.current-sub {
      color: var(--primary);
      background: rgba(0, 234, 255, .1);
      padding-right: 18px;
    }

    #mobMenuBtn {
      display: none;
      width: 48px;
      height: 48px;
      padding: 0;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.35rem;
      background: rgba(0, 234, 255, .09);
      border: 1px solid rgba(0, 234, 255, .4);
      border-radius: 13px;
      cursor: pointer;
    }

    /* ========================= منوی موبایل ========================= */

    #mobileMenu {
      position: fixed;
      top: 0;
      right: -430px;
      bottom: 0;
      z-index: 11000;
      width: min(88vw, 390px);
      height: 100dvh;
      padding: 95px 24px 35px;
      background: rgba(6, 15, 32, .995);
      border-left: 2px solid rgba(0, 234, 255, .55);
      box-shadow: -24px 0 65px rgba(0, 0, 0, .62);
      overflow-y: auto;
      transition: right .3s ease;
    }

    #mobileMenu.open { right: 0; }

    .mob-close-btn {
      position: absolute;
      top: 20px;
      left: 20px;
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      color: var(--primary);
      font-size: 1.25rem;
      background: rgba(0, 234, 255, .09);
      border: 1px solid rgba(0, 234, 255, .42);
      border-radius: 12px;
      cursor: pointer;
    }

    #mobileMenu ul {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    #mobileMenu .menu-item {
      height: auto;
      display: block;
      margin-bottom: 7px;
    }

    #mobileMenu .menu-item > a {
      min-height: 50px;
      height: auto;
      padding: 11px 12px;
      border-bottom: 1px solid rgba(0, 234, 255, .1);
      border-radius: 8px;
    }

    #mobileMenu .menu-item > a::after { display: none; }

    #mobileMenu .submenu {
      position: static;
      width: 100%;
      min-width: 0;
      padding: 5px 13px 8px 0;
      background: transparent;
      border: 0;
      box-shadow: none;
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
      transform: none;
    }

    #mobileMenu .submenu a {
      min-height: 39px;
      padding: 8px 13px;
      color: #a9cde2;
      font-size: .85rem;
    }

    .menu-backdrop {
      position: fixed;
      inset: 0;
      z-index: 10500;
      background: rgba(0, 0, 0, .54);
      opacity: 0;
      visibility: hidden;
      transition: opacity .25s ease, visibility .25s ease;
    }

    .menu-backdrop.show {
      opacity: 1;
      visibility: visible;
    }

    /* ========================= هیرو ========================= */

    .articles-hero {
      position: relative;
      min-height: 600px;
      padding: 175px 24px 125px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      background:
        radial-gradient(circle at 13% 20%, rgba(34, 211, 238, .25), transparent 29%),
        radial-gradient(circle at 87% 78%, rgba(139, 92, 246, .22), transparent 31%),
        linear-gradient(135deg, #061426 0%, #0b2940 52%, #101c35 100%);
      overflow: hidden;
      isolation: isolate;
    }

    .articles-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      z-index: -2;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size: 46px 46px;
    }

    .articles-hero::after {
      content: "";
      position: absolute;
      right: -5%;
      bottom: -78px;
      left: -5%;
      z-index: -1;
      height: 145px;
      background: var(--page-bg);
      border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    }

    .articles-hero-content {
      position: relative;
      z-index: 2;
      width: min(100%, 920px);
      margin: 0 auto;
    }

    .articles-eyebrow {
      width: fit-content;
      margin: 0 auto 22px;
      padding: 9px 18px;
      display: inline-flex;
      align-items: center;
      gap: 9px;
      color: #c5f8ff;
      font-size: .82rem;
      font-weight: 700;
      background: linear-gradient(135deg, rgba(34,211,238,.15), rgba(255,255,255,.055));
      border: 1px solid rgba(103,232,249,.28);
      border-radius: 30px;
      box-shadow: 0 12px 30px rgba(0,0,0,.2);
    }

    .articles-eyebrow i { color: #67e8f9; }

    .articles-hero h1 {
      margin: 0;
      color: transparent;
      font-size: clamp(3rem, 6vw, 5.5rem);
      font-weight: 900;
      line-height: 1.25;
      background: linear-gradient(90deg, #fff 0%, #67e8f9 27%, #60a5fa 52%, #c084fc 76%, #fff 100%);
      background-size: 240% auto;
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: titleGradient 6s linear infinite;
    }

    .articles-hero h1::after {
      content: "";
      display: block;
      width: 130px;
      height: 4px;
      margin: 22px auto 0;
      background: linear-gradient(90deg, transparent, #67e8f9, #60a5fa, #c084fc, transparent);
      border-radius: 30px;
      box-shadow: 0 0 20px rgba(103,232,249,.45);
    }

    .articles-description {
      max-width: 780px;
      margin: 25px auto 0;
      color: rgba(232,244,252,.92);
      font-size: clamp(1rem, 1.8vw, 1.22rem);
      line-height: 2.05;
    }

    .articles-hero-tags {
      margin-top: 32px;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 11px;
    }

    .articles-hero-tags span {
      min-height: 42px;
      padding: 9px 15px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #dff9ff;
      font-size: .82rem;
      font-weight: 600;
      background: rgba(255,255,255,.065);
      border: 1px solid rgba(103,232,249,.18);
      border-radius: 12px;
    }

    .articles-hero-tags i { color: #67e8f9; }

    /* ========================= محتوای اصلی ========================= */

    .articles-main {
      position: relative;
      background: linear-gradient(180deg, var(--page-bg) 0%, #f8fafb 100%);
    }

    .articles-container {
      width: min(100% - 40px, 1180px);
      margin-inline: auto;
      padding: 88px 0 120px;
    }

    .articles-heading {
      max-width: 760px;
      margin: 0 auto 48px;
      text-align: center;
    }

    .articles-heading > span {
      display: inline-flex;
      margin-bottom: 12px;
      padding: 7px 15px;
      color: #087d8e;
      font-size: .78rem;
      font-weight: 750;
      background: rgba(6,182,212,.09);
      border: 1px solid rgba(6,182,212,.17);
      border-radius: 30px;
    }

    .articles-heading h2 {
      margin: 0 0 16px;
      color: #102a43;
      font-size: clamp(1.9rem, 4vw, 3rem);
      font-weight: 900;
      line-height: 1.55;
    }

    .articles-heading p {
      max-width: 680px;
      margin: 0 auto;
      color: var(--muted);
      font-size: .98rem;
      line-height: 2;
    }

    .articles-grid:empty { display: none; }

    .no-articles {
      position: relative;
      width: min(100%, 940px);
      min-height: 465px;
      margin: 0 auto;
      padding: 62px 55px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: linear-gradient(145deg, rgba(255,255,255,.99), rgba(243,248,251,.97));
      border: 1px solid rgba(15,42,65,.1);
      border-radius: 18px 44px 18px 44px;
      box-shadow: 0 30px 75px rgba(15,42,65,.12), inset 0 1px 0 rgba(255,255,255,.95);
      overflow: hidden;
    }

    .no-articles::before {
      content: "";
      position: absolute;
      top: 0;
      right: 50%;
      width: 260px;
      height: 5px;
      background: linear-gradient(90deg, transparent, #06b6d4, #2563eb, #8b5cf6, transparent);
      transform: translateX(50%);
    }

    .no-articles > * { position: relative; z-index: 2; }

    .no-articles-icon {
      width: 104px;
      height: 104px;
      margin-bottom: 24px;
      display: grid;
      place-items: center;
      color: #07182d;
      font-size: 2.75rem;
      background: linear-gradient(135deg, #67e8f9, #60a5fa, #c084fc);
      border-radius: 29px;
      box-shadow: 0 20px 45px rgba(37,99,235,.2);
      animation: iconFloat 3.5s ease-in-out infinite;
    }

    .no-articles-label {
      margin-bottom: 14px;
      padding: 7px 15px;
      color: #087d8e;
      font-size: .78rem;
      font-weight: 750;
      background: rgba(6,182,212,.09);
      border: 1px solid rgba(6,182,212,.17);
      border-radius: 30px;
    }

    .no-articles h2 {
      margin: 0 0 20px;
      color: #102a43;
      font-size: clamp(1.75rem, 4vw, 2.8rem);
      font-weight: 900;
      line-height: 1.6;
    }

    .no-articles p {
      max-width: 720px;
      margin: 0 auto;
      color: #52687c;
      font-size: .97rem;
      line-height: 2.15;
    }

    .no-articles p + p { margin-top: 13px; }

    .articles-contact-button {
      margin-top: 28px;
      padding: 13px 22px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: .92rem;
      font-weight: 750;
      text-decoration: none;
      background: linear-gradient(135deg, #06b6d4, #2563eb);
      border-radius: 12px;
      box-shadow: 0 15px 32px rgba(37,99,235,.25);
    }

    /* ========================= فوتر ========================= */

    .footer {
      color: #dcebf6;
      background: #050d1b;
      border-top: 1px solid rgba(0,234,255,.18);
    }

    .footer-grid {
      padding: 72px 0 40px;
      display: grid;
      grid-template-columns: .8fr 1.2fr;
      gap: 70px;
    }

    .footer h4 {
      margin: 0 0 22px;
      color: var(--primary);
      font-size: 1.25rem;
      font-weight: 800;
    }

    .footer ul {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .footer li {
      margin-bottom: 10px;
      color: #c3d5e3;
      font-size: .91rem;
      line-height: 1.9;
    }

    .footer a {
      color: inherit;
      text-decoration: none;
    }

    .footer a:hover { color: var(--primary); }

    .footer-map {
      margin-top: 16px;
      overflow: hidden;
      border-radius: 12px;
    }

    .footer-map iframe { display: block; }

    .footer-bottom {
      padding: 17px 20px;
      color: #9eb3c4;
      text-align: center;
      font-size: .83rem;
      border-top: 1px solid rgba(255,255,255,.07);
    }

    /* ========================= واتس‌اپ ========================= */

    .whatsapp-float {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 9000;
      width: 62px;
      height: 62px;
      display: grid;
      place-items: center;
      color: #fff;
      font-size: 2rem;
      text-decoration: none;
      background: #20c96b;
      border-radius: 50%;
      box-shadow: 0 16px 36px rgba(32,201,107,.35);
    }

    .whatsapp-tooltip {
      position: absolute;
      right: 72px;
      width: max-content;
      padding: 7px 11px;
      color: #fff;
      font-size: .75rem;
      background: #081425;
      border-radius: 8px;
      opacity: 0;
      visibility: hidden;
      transition: .2s ease;
    }

    .whatsapp-float:hover .whatsapp-tooltip {
      opacity: 1;
      visibility: visible;
    }

    .fade-up {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity .7s ease, transform .7s ease;
    }

    .fade-up.show {
      opacity: 1;
      transform: translateY(0);
    }

    @keyframes titleGradient {
      to { background-position: 240% center; }
    }

    @keyframes iconFloat {
      0%, 100% { transform: translateY(0) rotate(-4deg); }
      50% { transform: translateY(-9px) rotate(2deg); }
    }

    /* ========================= ریسپانسیو ========================= */

    @media (max-width: 992px) {
      :root { --header-height: 76px; }

      .menu { display: none; }
      #mobMenuBtn { display: flex; }

      .nav-wrapper { width: min(100% - 24px, 1400px); }
      .brand-box > a, .brand-box img { width: 50px; height: 50px; }
      .brand-box .title { font-size: 1.06rem; }
      .brand-box small { font-size: .62rem; }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 42px;
      }
    }

    @media (max-width: 650px) {
      .articles-hero {
        min-height: 485px;
        padding: 125px 17px 85px;
      }

      .articles-hero::after {
        bottom: -55px;
        height: 105px;
      }

      .articles-eyebrow {
        margin-bottom: 17px;
        padding: 7px 13px;
        font-size: .69rem;
      }

      .articles-hero h1 { font-size: 2.45rem; }
      .articles-description { font-size: .89rem; line-height: 1.95; }
      .articles-hero-tags { margin-top: 25px; gap: 8px; }
      .articles-hero-tags span { min-height: 37px; padding: 7px 11px; font-size: .72rem; }

      .articles-container {
        width: min(100% - 28px, 1180px);
        padding: 58px 0 75px;
      }

      .articles-heading h2 { font-size: 1.65rem; }

      .no-articles {
        min-height: 390px;
        padding: 42px 22px;
        border-radius: 14px 30px 14px 30px;
      }

      .no-articles-icon {
        width: 85px;
        height: 85px;
        font-size: 2.15rem;
      }

      .no-articles h2 { font-size: 1.5rem; }
      .no-articles p { font-size: .9rem; line-height: 2; }
      .articles-contact-button { width: 100%; justify-content: center; }

      .brand-box .title { font-size: .92rem; }
      .brand-box small { display: none; }
      #mobileMenu { width: 91vw; }
    }